Exhibit 10.3
 
                 AMENDED AND RESTATED STOCK TRANSFER AGREEMENT
                 ---------------------------------------------

     THIS AMENDED AND RESTATED STOCK TRANSFER AGREEMENT (the "Amended Stock
Transfer Agreement"), is made this 28th day of December, 1995, by and among
Numatics, Incorporated, a Michigan corporation formerly known as Numatics
Acquisition Corporation (the "Company"), JOHN H. WELKER, individually and as
trustee of the John H. Welker Trust Agreement dated December 28, 1995, DAVID K.
DODDS, DONALD E. McGEACHY, HENRY FLEISCHER, individually and as trustee of the
Henry Fleischer Trust Under Agreement Dated March 10, 1993, ROBERT P. ROBESON,
JOHN E. ACUFF, BRUCE W. HOPPE, DAVID KING and PHILIP ROBINSON.

                                  WITNESSETH:

     WHEREAS, the undersigned entered into a Stock Transfer Agreement dated as
of November 29, 1990 among the Company; Norwest Equity Partners IV; Greylock
Investments Limited Partnership; Greylock Limited Partnership; State Treasurer
of the State of Michigan, Custodian of Public School Employees' Retirement
System; State Employees' Retirement System; Michigan State Police Retirement
System; Judges' Retirement System; Probate Judges' Retirement System; Heller
Financial, Inc.; John E. Acuff; William L. Behan; Roy A. Clark; David K. Dodds;
Henry Fleischer; Donald E. McGeachy; Robert P. Robeson; and John H. Welker (the
"Stock Transfer Agreement"); and

     WHEREAS, the undersigned, constituting all of the current shareholders of
the Company and all of the remaining parties to the Stock Transfer Agreement,
desire to amend the Stock Transfer Agreement as provided in this Amendment.

     NOW, THEREFORE, for good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, the undersigned amend and restate
the Stock Transfer Agreement as follows:

                                   ARTICLE I
                          DISPOSITIONS OF SECURITIES
                          --------------------------

     1.1  Restriction on Disposition Generally.  No Shareholder shall Dispose of
any of the Securities of the Company, whether now owned or hereafter acquired,
unless such Disposition is in strict compliance with this Agreement.

     1.2  Securities Transfer Book(s).

     (a)  The Company shall maintain at its principal executive office 
securities transfer book(s) in which shall be recorded, among other things, the
name and address of each record holder of Securities of the Company and the
number of shares or comparable information of each class series, or type of
Securities of the Company owned by each such record holder.

 
     (b)  No transfer or issuance of Securities of the Company shall be valid or
effective unless made in strict compliance with this Agreement.

     (c)  The Company shall not register a transfer of Securities unless such
transfer is in strict compliance with the provisions of this Agreement. The
Company may refuse to register a transfer of Securities of the Company until it
shall have received such evidence of compliance with this Agreement as may be
reasonably requested by it. The Company and the Shareholders shall be entitled
to regard the registered holder of the Securities as appearing on the securities
transfer book(s) of the Company as the actual owner thereof for all purposes.

     (d)  All Shareholders shall be entitled to inspect the securities transfer
book(s) maintained by the Company pursuant to this Section 1.2 during normal
business hours upon reasonable advance notice to the Company.

                                  ARTICLE II
            RESTRICTIONS ON DISPOSITIONS BY MANAGEMENT SHAREHOLDERS
            -------------------------------------------------------

     2.1  General Restrictions.

     (a)  No Management Shareholder shall Dispose of any Securities of the
Company, now owned or hereafter acquired, prior to the twelfth anniversary of
the Closing Date, except as permitted under Section 2.2 hereof, unless (i) the
Company and the Required Shareholders consent in writing to such Disposition and
approve the proposed transferee of such Securities, (ii) the proposed transferee
executes and delivers to the Company a Supplement hereto, and (iii) the
requirements of Section 6.11 are satisfied, if applicable.

     (b)  No Management Shareholder shall Dispose of any Securities of the
Company, now owned or hereafter acquired, on or after the twelfth anniversary of
the Closing Date, except as permitted under Section 2.2 hereof, unless (i) such
Management Shareholder shall first comply with the provisions of Section 2.6
hereof and (ii) the requirements of Section 6.11 are satisfied, if applicable.

     2.2  Exceptions to General Restrictions.  A Management Shareholder may 
Dispose of Securities of the Company without compliance with the provisions of
Section 2.1(a) or (b) or Section 2.6, as applicable, only as follows:

          (a)  pursuant to the mandatory or optional purchase or redemption of
     such Securities as provided in Section 2.3 or 2.4 hereof; or

          (b)  pursuant to a Registered Public Offering of such Securities; or

                                      -2-

 
          (c)  pursuant to an Open Market Transaction following the occurrence 
     of a Registered Public Offering of such Securities; or

          (d)  in the case of Welker, (i) up to a total of 2000 shares of Class 
     A Stock (appropriately adjusted to reflect stock splits, stock dividends,
     reorganizations, consolidations and similar changes effected after the
     initial issuance of such shares) plus any shares of Class A Stock purchased
     by Welker pursuant to the exercise of his rights under Sections 2.3, 2.4 or
     2.6 hereof to Person(s) in connection with their full-time employment with
     the Company or its subsidiaries, in each such case provided that such
     Person(s) execute(s) or deliver(s) a Supplement(s) to the Company and
     satisfy(ies) the requirements of Section 6.11 hereof, if applicable; or

          (e)  in the case of a Management Shareholder other than Welker, (i) to
     the Company or another Management Shareholder if unanimously approved by
     the Board of Directors of the Company, or (ii) to Welker (if he shall then
     own a majority of the outstanding Class A Stock) if the Board of Directors
     does not approve a proposed Disposition pursuant to clause (i); or

          (f)  by a Management Shareholder to a revocable trust if the grantor,
     initial and sole trustee, and sole beneficiary of the trust during the
     lifetime of the Management Shareholder is such Management Shareholder, if
     the trust (i) executes and delivers to the Company a Supplement hereto (for
     the purposes of Sections 2.3 and 2.4 hereof the Securities held by the
     trust will be deemed owned by the transferring Management Shareholder) and
     (ii) satisfies the requirements of Section 6.11 hereof, if applicable; or

          (g)  upon exercise of the rights of such Management Shareholder with
     respect to such Securities as set forth in the Tag-Along and Drag-Along
     Agreement.
 
          Any Dispositions by a Management Shareholder pursuant to Section
     2.2(b) or (c) shall be made free of any other restriction imposed by this
     Agreement upon such Disposition or upon any proposed transferee, and no
     direct or indirect transferee shall thereafter be subject to any
     restriction imposed by this Agreement.

          2.3  Mandatory Redemption and Optional Buy-Sell Agreements Upon Death,
     Total and Permanent Disability, Involuntary Discharge Without Cause After 2
     Years, Retirement, and Resignation After 12 Years of a Management
     Shareholder.

          (a)  Upon the occurrence of the following events with respect to a
     Management Shareholder:

          (i)  death;

                                      -3-

 
          (ii)  Total and Permanent Disability;

          (iii)  Involuntary Discharge Without Cause after the second 
          anniversary of the later of (i) the Closing Date or (ii) the date of
          hire by the Company or a subsidiary;

          (iv)  Retirement; or

          (v)  Resignation after the twelfth anniversary of the later of (A) the
          Closing Date or (B) the date of hire by the Company or a subsidiary.

     the Company shall, subject to Section 2.3(b) hereof, purchase and redeem
     from such Management Shareholder all Securities then owned by such
     Management Shareholder and such Management Shareholder shall sell such
     Securities to the Company for a redemption price equal to the Value Per
     Share of such Securities times the number of Securities being redeemed by
     the Company.

          The redemption price determined as provided in this Section 2.3(a)
     shall be payable by the Company either as follows:

          (1)  an amount equal to the least of (x) the redemption price, (y) the
     greater of (i) the maximum amount of cash of the Company as of the
     applicable closing date determined by the Board of Directors of the Company
     in good faith as being available for payment of the redemption price after
     consideration of the cash requirements for anticipated operations of the
     Company, or (ii) the proceeds of any life insurance, if any, maintained on
     the life of the affected Management Shareholder (other than life insurance
     designated as "key man" insurance by the Company which, in the case of John
     H. Welker, shall be not less than $5,000,000) actually received by the
     Company prior to the closing of the redemption as provided herein, or (z)
     the maximum amount the Company may lawfully pay in cash and which would not
     constitute a default under or violation of any agreement with another
     Person, shall be paid in cash, by the delivery of a check or by wire
     transfer to an account designated by the affected Management Shareholder,
     and the balance of the redemption price shall be payable by the delivery of
     a five-year subordinated promissory note of the Company in substantially
     the form of Attachment III hereto in the principal amount of such balance;
     or

          (2)  upon such other terms as may be agreed upon by the affected
     Management Shareholder and the Company (but only if such other terms are
     unanimously approved by the Board of Directors of the Company).

          Except as otherwise prohibited pursuant to the terms of the Securities
     Purchase Agreement, the promissory note described above in this Section
     2.3(a) shall bear interest at

                                      -4-

 
     an annual rate equal to the Applicable Federal Rate. The promissory note
     will be paid in three equal installments on the third, fourth and fifth
     anniversaries of the closing of the redemption and sale. Accrued interest
     will be paid annually. The promissory note will provide for mandatory
     prepayment out of the net proceeds of any subsequently issued Common Stock
     issued to a new member of management of the Company who replaces the
     affected Management Shareholder. The promissory note will also provide for
     mandatory prepayment out of the proceeds of any life insurance on the life
     of the affected Management Shareholder (other than "key man" insurance
     which, in the case of John H. Welker, shall not, together with other "key
     man insurance" of the Company on his life that is not paid by the Company
     pursuant to Section 2.3(a)(1), be less than $5,000,000) received by the
     Company after the closing of the redemption. The promissory note will be
     subordinated in that non-payment of scheduled payments or mandatory
     prepayments of principal and interest on the promissory note because of
     legal or contractual restrictions on such payments shall not constitute a
     default or permit acceleration of the unpaid principal or interest under
     the promissory note.

          The closing of the purchase and redemption shall occur on a date
     mutually agreeable to the Company and the Management Shareholder not later
     than ninety (90) days after the Chief Executive Officer or Chief Financial
     Officer of the Company obtains actual knowledge of the occurrence of any of
     the events described in clause (i), (ii), (iii) or (iv) or (v) above.
     
          (b)  If, but only if, the Company may not lawfully purchase and redeem
     all of the Securities owned by a Management Shareholder (other than Welker)
     as otherwise required under Section 2.3(a) hereof or the purchase or
     redemption thereof would constitute a default under or a violation of any
     agreement between the Company and any other Person, then the Company shall
     be obligated to purchase and redeem only such portion, if any, of such
     Securities as the Company may lawfully purchase or as shall not constitute
     such a default or violation, as the case may be, and Welker shall have the
     right (but only if Welker shall then own at least a majority of the
     outstanding Class A Stock, and, if not, then all Management Shareholders
     shall have the right on a pro rata basis in relation to their respective
     ownership of the Class A Stock), but not the obligation, to purchase all
     or, subject to Section 2.3(d) below, any portion of the Securities owned by
     such Management Shareholder not purchased by the Company and such
     Management Shareholder shall sell such Securities to Welker (or the
     Management Shareholders, as applicable) for a purchase price equal to the
     Value Per Share of such Securities times the number of Securities being
     purchased by Welker (or the Management Shareholders).

                                      -5-

 
          The purchase price determined as provided in this Section 2.3(b) shall
     be paid either as follows:

          (1)  an amount equal to the lesser of the purchase price or the 
     maximum amount determined in good faith by Welker (or the Management
     Shareholders purchasing a majority of the Securities of the affected
     Management Shareholder, as applicable) as being available to pay cash for
     such purchase, shall be paid in cash by the delivery of a check or wire
     transfer to an account designated by the affected Management Shareholder
     and the balance of the purchase price shall be payable by the delivery of a
     five year promissory note (or notes of the Management Shareholders on a pro
     rata basis) in substantially the form of Attachment IV hereto in the
     principal amount of such balance, or

          (2)  upon such other terms as may be agreed upon by the affected
     Management Shareholder and Welker (or the Management Shareholders, as
     applicable).

          The promissory note(s) described above in this Section 2.3(b) shall
     bear interest at an annual rate equal to the Applicable Federal Rate. The
     promissory note(s) will be paid in three equal installments on the third,
     fourth and fifth anniversaries of the closing of the purchase and sale.
     Accrued interest will be paid annually.

          The right to purchase hereunder shall be exercised by giving written
     notice thereof to the affected Management Shareholder and the Company
     within thirty (30) days after the giving by the Company of the notice
     specified in Section 2.3(e) below that the Company is unable to purchase
     and redeem all or a part of the Securities. A copy of the notice from
     Welker shall also be sent to the Company. The closing of the purchase and
     sale shall occur on a date mutually agreeable to the affected Management
     Shareholder and Welker (or the Management Shareholders, as applicable) and
     shall, to the extent practicable, be coordinated with the closing of the
     redemption of Securities by the Company under this Section 2.3, if any, but
     in any event shall not be later than sixty (60) days after giving the
     notice of exercise contemplated in this Section 2.3(b).

          (c)  In no event shall Welker (or the Management Shareholders, as
     applicable) in the exercise of their rights under this Section 2.3 have the
     right to purchase less than all of the Securities owned by the affected
     Management Shareholder not purchased by the Company, unless otherwise
     agreed by the affected Management Shareholder.

          (d)  The Company shall give written notice to the affected Management
     Shareholder and Welker (or the Management Shareholders, as applicable) of
     its inability to purchase and

                                      -6-

 
     redeem all or a part of the Securities under Section 2.3(a) as promptly as
     practicable under the circumstances.

          (e)  Any Securities owned by the affected Management Shareholder that
     are not redeemed or purchased by the Company or Welker (or the Management
     Shareholders, as applicable) as provided in this Section 2.3 may be
     Disposed of by the affected Management Shareholder free of any restriction
     imposed by this Agreement upon such Disposition or upon any proposed
     transferee other than satisfaction of the requirements under Section 6.11,
     if applicable, and no direct or indirect transferee shall thereafter be
     subject to any restriction imposed by this Agreement.

     2.4  Optional Redemption and Buy-Sell Agreements upon Resignation Prior to
12 Years, Involuntary Discharge With Cause, Involuntary Discharge Without Cause
Prior to 2 Years, and certain Other Events With Respect to a Management
Shareholder.

          (a)  Upon the occurrence of any of the following events with respect
     to a Management Shareholder:

          (i)  Resignation on or prior to the twelfth anniversary of the later 
     of the (A) Closing Date or (B) the date of hire by the Company or a
     subsidiary;

          (ii)  Involuntary Discharge With Cause;

          (iii)  any physical or mental impairment as a result of self-inflicted
     injury, alcoholism, drug abuse or addiction which, in the reasonable
     judgment of the Board of Directors of the Company, has rendered such
     Management Shareholder substantially unable to perform his duties as an
     officer or employee of the Company for a period of six consecutive months;

          (iv)  Involuntary Discharge Without Cause on or prior to the second
     anniversary of the later of (A) the Closing Date or (B) the date of hire by
     the Company or a subsidiary;

          (v)  any transfer of Securities owned by such Management Shareholder 
     by operation of law, including by way of example and not of limitation,
     pursuant to any court or governmental order or by attachment, execution or
     similar process, or pursuant to a divorce decree; or

          (vi)  the filing of a petition under any bankruptcy or similar law by
     or against such Management Shareholder,

     the Company (if approved unanimously by its Board of Directors) shall have
     the right, but not the obligation, to purchase and redeem from such
     Management Shareholder all or, subject to Section 2.4(d) hereof, any
     portion of the Securities then owned by such Management Shareholder, and,
     if

                                      -7-

 
     such right shall be exercised by the Company as provided herein, such
     Management Shareholder shall sell such Securities to the Company for a
     redemption price equal to the Adjusted Cost Per Share of such Securities
     times the number of Securities being redeemed by the Company.

          The redemption price determined as provided in this Section 2.4(a)
     shall be payable as provided in Section 2.3(a).

          The Company shall give written notice to the affected Management
     Shareholder and the Management Shareholders of the election to exercise its
     rights under this Section 2.4(a) within thirty (30) days after the Chief
     Executive Officer or the Chief Financial Officer of the Company obtains
     actual knowledge of the occurrence of any of the events described in clause
     (i), (ii), (iii), (iv), (v) or (vi) above. The closing of the redemption
     shall occur within ninety (90) days after written notice from the Company
     to the affected Management Shareholders specifying that such right is being
     exercised.

          (b)  If the right to redeem provided to the Company in Section 2.4(a)
     is not exercised, or is exercised only partially, Welker shall have the
     right (but only if Welker shall then own at least a majority of the
     outstanding Class A Stock, and, if not, then all Management Shareholders
     shall have the right on a pro rata basis in relation to their respective
     ownership of the Class A Stock) to purchase all or, subject to Section
     2.4(d) below, any portion of the Securities held by such Management
     Shareholder, other than Welker, not redeemed by the Company under Section
     2.4(a), and, if such right is so exercised, the affected Management
     Shareholder shall sell such Securities to Welker (or the Management
     Shareholders, as applicable) for the Adjusted Cost Per Share of such
     Securities times the number of Securities being purchased.

          The purchase price determined in accordance with this Section 2.4(b)
     shall be payable on the terms described in Section 2.3(a).

          The right to purchase hereunder shall be exercised by giving written
     notice thereof to the affected Management Shareholder and the Company
     within thirty (30) days after the later of either (i) the giving by the
     Company of the notice contemplated in Section 2.4(a) (specifying the
     redemption by the Company of less than all of the Securities owned by the
     affected Management Shareholder), or (ii) notice from the Company that the
     Company declines to exercise its right under Section 2.4(a). A copy of the
     notice from Welker (or the Management Shareholders, as applicable) shall be
     given to the Company.

          The closing of the purchase and sale shall occur on a date mutually
     agreeable to the affected Management Shareholder

                                      -8-

 
     and Welker (or the Management Shareholders, as applicable) not later than
     sixty (60) days after the date the notice of exercise by Welker (or the
     Management Shareholders, as applicable) referred to in the immediately
     preceding paragraph is given and, to the extent practicable, shall be
     coordinated with the closing of redemption by the Company, if any, pursuant
     to Section 2.4(a) above.

          (c)  In no event shall the Company or Welker (or the Management
     Shareholders, as applicable) in the exercise of their rights under this
     Section 2.4 have the right to redeem or purchase less than all of the
     Securities owned by the affected Management Shareholder, unless otherwise
     agreed by the affected Management Shareholder.

          (e)  Any Securities owned by the affected Management Shareholder that
     are not redeemed or purchased by the Company or Welker (or the Management
     Shareholders, as applicable) as provided in this Section 2.4 may be
     Disposed of by the affected Management Shareholder free of any restriction
     imposed by this Agreement upon such Disposition or upon any proposed
     transferee other than satisfaction of the requirements of Section 6.11, if
     applicable, and no direct or indirect transferee shall thereafter be
     subject to any restriction imposed by this Agreement.

          2.5  Option(s).  In the event that any shares of Class A Stock of the
     Company owned of record by any Management Shareholder other than Welker are
     purchased and redeemed by the Company pursuant to Sections 2.3, 2.4, or 2.6
     hereof, the Company shall, on the date such shares are purchased and
     redeemed, grant to such present or prospective officers or employees of the
     Company or any subsidiary as may be specified by the Chief Executive
     Officer of the Company (and which may include such Chief Executive Officer)
     in writing, irrevocable option(s) ("Option(s)") to purchase a number of
     authorized but unissued shares of Class A Stock specified by the Chief
     Executive Officer, which shall not exceed, in the aggregate, the number of
     shares so purchased and redeemed (appropriately adjusted to reflect stock
     splits, stock dividends, reorganizations, consolidations and similar
     changes effected after the redemption), pursuant to an option agreement(s)
     in substantially the form of Attachment V hereto. The Company agrees to
     execute and deliver such option agreement(s), appropriately completed, to
     the appropriate option holder on the date of the closing of the redemption
     and sale of the shares. The Company shall reserve sufficient shares of
     Class A Stock as may be required to be issued upon exercise of any
     Option(s).

          The Option(s) shall be freely transferable by the Chief Executive
     Officer of the Company, with respect to options held by such Chief
     Executive Officer, to any present or prospective officer or employee of the
     Company, provided that any such

                                      -9-

 
     employee or officer who is not a Management Shareholder first (i) executes
     and delivers to the Company a Supplement hereto and (ii) executes and
     delivers a supplement to the Voting Agreement dated as of even date
     herewith (the "Voting Agreement") among the Company and the Management
     Shareholders and a proxy as described in Section 4.11 of the Voting
     Agreement. Option(s) held by any other option holder shall not be
     transferable.

          The Option(s) shall be exercisable at any time and from time to time
     by the option holder(s) at an exercise price per share equal to the
     redemption price per share paid by the Company to redeem the shares. The
     provisions of Sections 2.3 and 2.4 shall apply equally to the Option(s) to
     the extent not exercised at the time of the occurrence of the event giving
     rise to the redemption and/or buy-sell rights set forth in such Sections as
     if such Option(s) had been previously exercised for Class A Stock except
     that the per share redemption or purchase price determined in accordance
     with such Sections shall be reduced by an amount equal to the per share
     option exercise price of the Option(s).

          In the event of a proposed dissolution or liquidation of the Company
     or a proposed sale of substantially all of the assets of the Company or a
     proposed merger or consolidation of the Company or a statutory share
     exchange involving capital stock of the Company, outstanding Options may be
     subject to cancellation and/or replacement as more fully described in the
     form of Option Agreement attached hereto as Attachment V hereto.

          2.6  Rights of First Refusal.  In the event that a Management 
     Shareholder shall desire to Dispose of any or all of the Securities of the
     Company now owned or hereafter acquired by such Management Shareholder on
     or after the twelveth anniversary of the Closing Date except as permitted
     in Section 2.2 hereof and except for sales pursuant to Section 2.3 or 2.4
     hereof (the "Offered Shares"), such Shareholder (the "Offering
     Shareholder") must first obtain an Offer to purchase the Offered Shares and
     deliver written notice of the Offer to the Company and to Welker (or the
     Management Shareholders, as applicable) (the "Non-Offering Shareholders").
     The written notice of the Offer must comply with the requirements of
     Section 2.6(i) hereof. Thereafter, the following rights shall accrue:

          (a)  The Company (if approved unanimously by its Board of Directors)
     shall have the right to purchase and redeem all or, subject to Section
     2.6(e) below, any part of the Offered Shares, and if the Company elects to
     exercise such right then the Offering Shareholder shall sell such shares to
     the Company for a purchase price equal to the purchase price for the
     Offered Shares set forth in the Offer. The Company shall give written
     notice to the Offering Shareholder of the election to

                                      -10-

 
     exercise its rights under this Section 2.6(a) within the thirty (30) day
     period (the "Initial Exercise Period") following receipt by the Company of
     the written notice of the Offer.

          (b)  If the right to purchase provided in Section 2.6(a) above shall
     not be exercised by the Company, or exercised only partially, Welker shall
     have the right (but only if Welker shall then own at least a majority of
     the outstanding Class A Stock and, if not, then all Management Shareholders
     shall have the right on a pro rata basis in relation to their respective
     ownership of Class A Stock) to purchase all or, subject to Section 2.6(c)
     hereof, any portion of the Offered Shares not purchased by the Company
     under Section 2.6(a) above from a Management Shareholder other than Welker,
     and if Welker (or the Management Shareholders, as applicable) elect(s) to
     exercise such right, then the Offering Shareholder shall sell such shares
     to Welker (or the Management Shareholders, as applicable) for a purchase
     price equal to the purchase price for the Offered Shares set forth in the
     Offer. Welker (or the Management Shareholders, as applicable) shall give
     written notice to the Offering Shareholder of his election to exercise his
     (or the Management Shareholders, as applicable) right under this Section
     2.6(b) within thirty (30) days after the later of (i) the expiration of the
     Initial Exercise Period or (ii) the date Welker (or the Management
     Shareholders, as applicable) receives written notice from the Offering
     Shareholder of the Offer (the "Interim Exercise Period").

          (c)  In no event shall the Company or Welker (or the Management
     Shareholders, as applicable), in the exercise of the rights of first
     refusal provided in this Section 2.6 have the right to purchase less than
     all the Offered Shares, unless otherwise agreed by the Offering
     Shareholder.

          (d)  Each Management Shareholder hereby agrees to not Dispose of any
     Offered Shares until the expiration of the Exercise Period (or until the
     Company, Welker (or the Management Shareholders, as applicable) have waived
     in writing their rights of first refusal provided for in this Section 2.6).

          (e)  The purchase price of the Offered Shares determined in accordance
     with the provisions of this Section 2.6 shall be payable (x) at the option
     of the Company, Welker (or the Management Shareholders, as applicable), as
     the case may be, either (1) upon substantially equivalent terms to the
     terms set forth in the Offer, or (2) in cash by cashier's check or wire
     transfer to an account designated by the Offering Shareholder in an amount
     equal to what the Board of Directors of the Company determines in good
     faith to be the fair value of an Offer that consists in whole or part of
     non-cash consideration, or (y) upon such other terms as may be agreed by
     the Offering Shareholder and the Company (if approved

                                      -11-

 
     unanimously by its Board of Directors), Welker (or the Management
     Shareholders, as applicable), as the case may be. The closing of the
     purchase and sale under this Section 2.6 shall occur on a mutually
     agreeable date within thirty days after the expiration of the Exercise
     Period but may occur on any other mutually agreeable date.

          (f)  A refusal or failure to exercise any right of first refusal under
     Section 2.6 shall not constitute a waiver or refusal of such rights with
     respect to any other or subsequent Offer.

          (g)  In the event that the Offered Shares are not Disposed of pursuant
     to the Offer within ninety (90) days after the expiration of the Exercise
     Period (or, if earlier, the date on which the Offering Shareholder receives
     written waivers of the Company's and Welker's rights of first refusal),
     then the Offer shall thereupon be deemed to be a new Offer for the purposes
     of Section 2.6 and the procedures specified herein must be satisfied as to
     such new Offer before the Offered Shares may be Disposed of by the Offering
     Shareholder.

          (h)  For the purposes of Section 2.6, the written notice of an Offer
     must be a notice in writing complying with the further requirements of this
     Section 2.6(h), signed by the Offering Shareholder and sent to the Company
     or Welker (or the Management Shareholders, as applicable), in one of the
     ways prescribed in Section 6.1. The written notice must contain a true and
     complete copy of the Offer setting forth the price and all terms and
     conditions of the Offer and the name, address and a description of the
     business or other occupation of the offeror. Any notice that does not
     contain all of the information required in this Section 2.6(h) or which
     otherwise does not comply with the requirements of this Section shall not
     constitute "written notice of the Offer" for the purposes of this Section
     2.6. The Offering Shareholder agrees to cause the offeror to give the
     Company, Welker (or the Management Shareholders, as applicable), such
     additional information concerning the Offer and the offeror as may be
     reasonably requested by the Company or Welker (or the Management
     Shareholders).

                                  ARTICLE III
                                    LEGEND
                                    ------
                 
     3.1  Legend.  All certificates representing Securities held by Management 
Shareholders of the Company shall contain a legend on the face of the
certificate substantially to the following effect.

          "THIS CERTIFICATE IS SUBJECT TO TRANSFER AND OTHER RESTRICTIONS NOTED
          ON THE REVERSE HEREOF."

                                      -12-

 
A legend shall also be placed on the reverse of certificates or in the body of
instruments representing Securities of the Company substantially to the
following effect.

     "THE SECURITIES REPRESENTED BY THIS CERTIFICATE ARE SUBJECT TO CERTAIN
     RESTRICTIONS ON TRANSFER AND ENCUMBRANCE AND RIGHTS OF FIRST REFUSAL AND
     OFFER AS GRANTED AND PROVIDED IN A CERTAIN AMENDED AND RESTATED STOCK
     TRANSFER AGREEMENT (THE "AGREEMENT") DATED AS OF DECEMBER 28, 1995, BY AND
     BETWEEN THE ISSUER AND HOLDERS OF CERTAIN SECURITIES OF THE ISSUER, A COPY
     OF WHICH IS ON FILE WITH THE SECRETARY OF THE ISSUER."

     Each Shareholder agrees to deliver its or his certificates to the Company
for imposition of the above legends.

     3.2  Filing of Agreement. An executed counterpart of this Agreement shall
be put and remain on file during the term hereof at the principal executive
office of the Company.

     3.3  Stop Order. A stop transfer order shall be placed with the Company's
transfer agent and/or in the Company's securities transfer records preventing
transfer of any of the Securities pending compliance with the terms of this
Agreement.

                                  ARTICLE IV
                                  TERMINATION
                                  -----------      

     This Agreement shall remain fully in effect and enforceable until
terminated by written instrument by and between the Company and the Required
Shareholders, or their respective personal representatives, guardians,
conservators, trustees, other legal representatives, successors, and assigns.


                                   ARTICLE V
                              CERTAIN DEFINITIONS
                              -------------------  

     When used in this Agreement, the following capitalized terms shall have the
following meanings respectively:

     "Adjusted Cost Per Share" means, as of any Computation Date with respect to
each type of Securities owned by a Management Shareholder, the lesser of the
Value Per Share of such Security or the amount determined below:

          (a)  in the case of Class A Stock, an amount equal to the sum of (i)
     the amount per share paid by the Management Shareholder to acquire such
     Securities (as

                                      -13-

 
     established by written documentation satisfactory to the Company) and (ii)
     interest thereon at the Applicable Rate (based on a year of 365 or 366 days
     for the actual number of days elapsed) from the date such Securities were
     acquired by such Management Shareholder to but not including the
     Computation Date;

     "Affiliate" means with respect to any Person, any Person (a) directly or
indirectly controlling, controlled by, or under common control with, such
Person; (b) directly or indirectly owning or holding ten percent (10%) or more
of the voting stock or equity interest in such Person; or (c) ten percent (10%)
or more of whose voting stock or other equity interest is owned directly or
indirectly or held by such person. For purposes of this definition, "control"
(including with correlative meanings, the terms "controlling," "controlled by"
and "under common control with") means the possession directly or indirectly of
the power to direct or cause the direction of the management and policies of a
Person, whether through the ownership of voting securities or by contract or
otherwise.

     "Agreement" means this Stock Transfer Agreement, as the same may be amended
or supplemented from time to time as permitted herein.

     "Applicable Federal Rate" means the lowest per annum interest rate allowed
under Section 1274(d) of the Internal Revenue Code of 1986, as amended, as
determined for the month in which the Computation Date shall occur.

     "Applicable Rate" shall mean the lesser of (a) or (b) below:

          (a)  (i)  in the case of the Resignation of a Management Shareholder
     after the fifth anniversary of the later of (A) the Closing Date or (B) the
     date of hire by the Company or a subsidiary, or Involuntary Discharge
     Without Cause of such Management Shareholder on or prior to the second
     anniversary of the later of (A) the Closing Date or (B) the date of hire by
     the Company or a subsidiary, 14% per annum, and (ii) in the case of the
     Resignation of a Management Shareholder on or prior to the fifth
     anniversary of the later of (A) the Closing Date or (B) the date of hire by
     the Company or a subsidiary, or any of the other events described in clause
     (ii), (iii), (v) or (vi) of Section 2.4, 10% per annum; or

          (b)  the maximum rate permitted by law.

     "Class A Stock" has the meaning set forth in the Articles of Incorporation
of the Company, as amended.

                                      -14-

 
     "Closing Date" means the date the closing of the transactions contemplated
in the Asset Purchase Agreement dated as of October 5, 1990 among Numatics,
Incorporated, a Michigan corporation, as Seller, William Carls, John H. Welker,
Harold E. Stieg, and Arthur B. Derisley, as Selling Stockholders, and NAC, Inc.,
as Buyer (which rights of NAC, Inc. under the Asset Purchase Agreement were
subsequently assigned by NAC, Inc. to the Company and its subsidiaries).

     "Common Stock" shall have the meaning set forth in the Articles of
Incorporation of the Company, as amended.

     "Company" means Numatics, Incorporated, a Michigan corporation.

     "Computation Date" means the date which is the last day of the month
immediately preceding the month in which any event giving rise to the redemption
and buy-sell agreements set forth in Sections 2.3 or 2.4 shall occur.

     "Disposition" (including the verb "Dispose") means and includes any
assignment, sale, transfer, exchange, granting of any option or other, right to
acquire, conveyance, gift, disposition, pledge, hypothecation or encumbrance
whatsoever, whether voluntary or involuntary, or by operation of law (including
by way of example and with limitations, the laws of descent and distribution and
the laws of bankruptcy).

     "Final Exercise Period" shall have the meaning set forth in Section 2.6
hereof.

     "Initial Exercise Period" shall have the meaning set forth in Section 2.6
hereof.

     "Interim Exercise Period" shall have the meaning set forth in Section 2.6
hereof.

     "Involuntary Discharge With Cause" means, with respect to any Management
Shareholder, the involuntary termination by the Company or a subsidiary of
employment of such Management Shareholder with the Company or such subsidiary as
a result of any of the following: (i) willful and gross neglect of duties, (ii)
conviction of a felony, or (iii) serious misconduct in the course of employment
involving dishonesty.

     "Involuntary Discharge Without Cause" means, with respect to a Management
Shareholder, the termination by the Company or a subsidiary of employment of
such Management Shareholder with the Company or such subsidiary for any reason
other than any such termination constituting Involuntary Discharge With Cause.

     "Management Shareholders" means and includes (a) John E. Acuff, David K.
Dodds, Bruce Hoppe, Henry Fleischer, David

                                      -15-

 
King, Donald E. McGeachy, Robert P. Robeson, Philip Robinson and John H. Welker,
and (b) any other Person after the Closing Date who shall execute and deliver a
Supplement pursuant to Section 2.2(d), Section 2.2(f) or Section 2.5 hereof, and
the respective heirs, successors and permitted assigns of each of the foregoing
Persons, the trustee of any trust created by any such Person or any successor or
assign of any such Person, the executor or administrator of the estate of any
such Person, or any other personal representative, conservator, executor,
successor, trustee of such Person or any other Person charged with the custody,
administration or disposition of the assets of such Person, all of whom by
succession to right in any Securities now owned or hereafter acquired by such
Person shall become bound by the terms of this Agreement.

     "Offer" means a legally enforceable bona fide offer to a Management
Shareholder in writing, made and signed by an offeror who (i) is not an
Affiliate of the Offering Shareholder, and (ii) is a Person financially capable
of carrying out the terms of the Offer.

     "Offered Shares" has the meaning set forth in Section 2.6 hereof.

     "Offering Shareholder" has the meaning set forth in Section 2.6 hereof.

     "Open Market Transaction" means a transaction complying with the manner of
sale requirements set forth in paragraph (f) of Rule 144 promulgated under the
Securities Act of 1933, as amended, whether or not Rule 144 is otherwise
applicable to the transaction.

     "Option(s)" shall have the meaning set forth in Section 2.5 hereof.

     "Person" means any entity, whether an individual, trustee, unincorporated
organization, business association or firm, joint venture, a government or any
agent or instrumentality or political subdivision thereof, or otherwise.

     "Registered Public Offering" means, in the case of Securities of the
Company, a sale of such Securities to the public pursuant to a Registration
Statement filed with, and declared effective by, the Securities Exchange
Commission under the Securities Act of 1933, as amended, other than pursuant to
an employee benefit plan or a dividend or interest reinvestment plan.

     "Required Shareholders" means shareholders who or which are the registered
holders of not less than a majority of the outstanding Class A Stock of the
Company (on a fully diluted basis including options to acquire Class A Stock).

                                      -16-

 
     "Resignation" means, with respect to a Management Shareholder, the
voluntary termination of employment of such Management Shareholder with the
Company or a subsidiary by such Management Shareholder for any reason other than
Retirement.

     "Retirement" means, with respect to a Management Shareholder, any
termination of employment of such Management Shareholder with the Company or a
subsidiary following obtaining the age of sixty-five (65) other than any such
termination constituting Involuntary Discharge With Cause.

     "Securities" means any and all of the securities of the Company identified
in Attachment I hereto.

     "Securities Purchase Agreement" means the Securities Purchase Agreement
dated as of January 3, 1996 among the Company and Harvard Private Capital
Holdings, Inc., as the same may be amended from time-to-time as permitted
therein.

     "Supplement" means a Supplement to Stock Transfer Agreement in
substantially the form of Attachment II hereto, appropriately completed.

     "Tag-Along and Drag-Along Agreement" means the Tag-Along and Drag-Along
Agreement dated as of January 3, 1996 among the Company, the Shareholders and
Harvard Private Capital Holdings, Inc., as the same may be amended from time-to-
time as permitted therein.

     "Total and Permanent Disability" means, with respect to a Management
Shareholder, any physical or mental impairment (other than an impairment as a
result of (i) self-inflicted injuries, (ii) alcoholism or (iii) drug abuse or
addiction) that, on the basis of a written medical opinion satisfactory to the
Company, has rendered such Management Shareholder substantially unable to
perform his duties as an officer or employee of the Company for a period of six
(6) consecutive months.

     "Value Per Share" means, as of any Computation Date with respect to each
type of Securities owned by a Management Shareholder, the amount determined on a
per share basis in accordance with Section 7.4.1 of Exhibit 7 (Put and Call
Rights) to the Securities Purchase Agreement.

     "Voting Agreement" shall have the meaning set forth in Section 2.5 hereof.

     "Welker" means John H. Welker, individually.

                                      -17-

 
                                  ARTICLE VI
                                 MISCELLANEOUS
                                 -------------

     6.1  Notices. Any notice to be given pursuant to this Agreement shall be
deemed to have been given and received, and to be effective for all purposes,
when delivered personally or when sent by registered mail to the addresses of
the parties hereto as set forth on the signature page hereof (or such other
addresses as the parties may hereafter designate in writing).

     6.2  Specific Performance. Each Shareholder acknowledges and agrees that
any breach of this Agreement by any Shareholder will cause incalculable and
irremediable damages to the other Shareholders, and that in the event that any
Shareholder shall breach or attempt to breach the terms of this Agreement, each
of the other Shareholders shall be entitled as a matter of right to obtain from
any court of competent jurisdiction an injunction (i) prohibiting further
breaches of this Agreement, (ii) rescinding any action taken, and (iii)
specifically enforcing the terms of this Agreement.

     6.3  Further Instruments and Documents. Each of the parties hereto
covenants and agrees that he/she/it will make, execute and deliver any and all
such other and further instruments, papers and documents, and will do and
perform any and all such further acts and things, as shall be or become
necessary, proper or convenient to carry out, put into effect or make operative
their respective covenants, promises and undertakings contained in this
Agreement.

     6.4  Modification. This Agreement constitutes the entire agreement between
the parties hereto with respect to the subject matter hereof, and may not be
amended, modified or varied except by an instrument in writing executed by the
Company and the Required Shareholders.

     6.5  Construction. This Agreement shall be governed in all respects,
whether as to validity, construction, capacity, performance or otherwise, under
the laws of the State of Michigan.

     6.6  Severance. In the event that any provision hereof shall be determined
to be invalid or unenforceable for any reason, such invalidity or unenforceable
shall not affect the validity and enforceability of the remaining valid and
enforceable provisions hereof, which shall be construed as if such invalid or
unenforceable provisions had not been inserted in this Agreement.

     6.7  Successors Bound. This Agreement shall be binding upon the parties
hereto, their personal representatives, successors and assigns and shall inure
to the benefit to the

                                      -18-

 
parties hereto, their personal representatives, successors and permitted
assigns.

     6.8   Suppression. This Agreement cancels and supersedes any prior verbal
or written agreement between the parties hereto pertaining to the subject matter
hereof.

     6.9   Interpretation. Headings contained in this Agreement are for
reference purposes only and shall not affect the meaning or interpretation of
this Agreement. Whenever reasonably necessary, pronouns of any gender shall be
deemed synonymous, as shall singular and plural pronouns.

     6.10  Counterparts. This Agreement may be executed in several counterparts,
each of which shall be deemed an original, but together they shall constitute
one and the same instrument.

     6.11  Voting Agreement. Notwithstanding anything to the contrary contained
herein, it shall be a condition to the transfer or issuance of any shares of
Class A Stock of the Company, to any Person otherwise permitted under this
Agreement (other than pursuant to Sections 2.2(b) or (c)), that such Person
execute and deliver a supplement to the Voting Agreement and a proxy as
described in Section 3.11 of the Voting Agreement.


                 [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]

                                      -19-

 
     IN WITNESS WHEREOF, this Amendment is executed as of the date first above
written.

                                        NUMATICS, INCORPORATED, a
                                        Michigan corporation

                                           
                                        By /s/ JOHN H. WELKER
                                          -------------------------------
                                           Its:  President

                                           /s/ JOHN H. WELKER
                                        ---------------------------------
                                        John H. Welker, individually
                                        and as trustee of the John H.
                                        Welker Trust Agreement dated
                                        December 28, 1995

                                           /s/ DAVID K. DODDS
                                        ---------------------------------
                                        David K. Dodds

                                           /s/ DONALD E. MCGEACHY
                                        ---------------------------------
                                        Donald E. McGeachy

                                           /s/ HENRY FLEISCHER
                                        ---------------------------------
                                        Henry Fleischer, individually
                                        and as trustee of the Henry
                                        Fleischer Trust Under Agreement
                                        Dated March 10, 1993

                                           /s/ ROBERT P. ROBESON
                                        ---------------------------------
                                        Robert P. Robeson

                                           /s/ JOHN E. ACUFF
                                        ---------------------------------
                                        John E. Acuff

                                           /s/ BRUCE W. HOPPE
                                        ---------------------------------
                                        Bruce W. Hoppe

                                           /s/ DAVID KING
                                        ---------------------------------
                                        David King


                                      -20-

 
                                        /s/ PHILIP ROBINSON
                                        ---------------------------------
                                        Philip Robinson

                                        /s/ DAVID M. REESE
                                        ---------------------------------
                                        David M. Reese

                                      -21-

 
 
                                 ATTACHMENT II

                    SUPPLEMENT TO STOCK TRANSFER AGREEMENT


     This Supplement to Stock Transfer Agreement (the "Supplement") is made,
executed and delivered by the undersigned as of this _____ day of ___________,
19__.

                                  WITNESSETH:

     WHEREAS, a Stock Transfer Agreement has been executed and delivered as of
the ___ day of November, 1990 by and between Numatics Acquisition Corporation, a
Michigan corporation (the "Company"); Northwest Equity Partners IV; Greylock
Investments Limited Partnership; Greylock Limited Partnership; State Treasurer
of the State of Michigan, Custodian of Public School Employees' Retirement
System; State Employees' Retirement System; Michigan State Police Retirement
System; Judge's Retirement System; Probate Judges' Retirement System; Heller
Financial, Inc.; John E. Acuff; William L. Behan; Roy A. Clark; David K. Dodds;
Henry Fleischer; Donald E. McGeachy; Robert P. Robeson; and John H. Welker; (the
"Agreement"); and

     WHEREAS, it is a condition to either the transfer to the undersigned of any
Securities of the Company or an option to purchase shares of Class A Stock or
Class C Stock purchased and redeemed by the Company pursuant to the terms of the
Agreement, that the undersigned become a party to the Agreement and the
undersigned is executing and delivering this Supplement in satisfaction of such
condition.

     NOW, THEREFORE, in consideration of the premises and other good and
valuable consideration, the receipt and adequacy of which is hereby
acknowledged, the undersigned hereby agrees as follows:

     1.   Capitalized terms used herein shall have the respective meanings set
forth in the Agreement.

     2.   By execution and delivery of this Supplement, the undersigned hereby
joins the Agreement and hereby agrees to be bound by and perform all of the
covenants, promises, agreements and undertakings under the Agreement to the same
extent as if the undersigned had been an original signatory to the Agreement.

     3.   If any Class A Stock or Class C Stock, or an option to acquire the
same, is being transferred or granted to the undersigned, the undersigned is
also executing and delivering contemporaneously herewith (a) a supplement to the
Voting

                                     II-1

 
Agreement and a Proxy to Welker and (b) the written agreement contemplated in
Section 3.3 of the Co-Sale Agreement.

     4.   This Supplement shall be governed in all respects, whether as to
validity, construction, capacity, performance or otherwise, under the laws of
the State of Michigan.

     IN WITNESS WHEREOF, the undersigned has executed this Supplement as of the
day and year first above written.



                                                  ______________________________


                                     II-2

 
                                ATTACHMENT III

                         SUBORDINATED REDEMPTION NOTE


$______________                                                ___________, 19__


     FOR VALUE RECEIVED, the undersigned, Numatics Acquisition Corporation, a
Michigan corporation (the "Buyer"), hereby promises to pay to the order of
__________ ______________________, (the "Seller"), the principal sum of
$____________ in three (3) consecutive equal annual installments of $___________
each, commencing on that date which is the third anniversary of the date of this
Note and continuing thereafter on each anniversary of the date of this Note
through and including the date which is the fifth anniversary of the date of
this Note at which time all remaining principal and accrued interest thereon
shall be due and payable in full. Interest shall accrue on the unpaid principal
balance hereof from the date hereof at the rate per annum equal to the
Applicable Federal Rate (hereinafter defined) (computed on the basis of a 360-
day year, 30-day month) and shall be payable annually on ________________ of
each year, commencing _______________, 19__ and continuing until payment in full
of the principal hereof.

     "Applicable Federal Rate" means the lowest per annum interest rate allowed
under Section 1274(d) of the Internal Revenue Code of 1986, as amended, as
determined for a month in which an interest payment hereunder shall be due and
payable.

     This Note is prepayable in whole or in part, at any time and from time to
time, at the option of the Buyer, without premium. Any optional prepayment shall
be applied first to accrued and unpaid interest and then to installments of
principal in such order as the Buyer may elect.

     After the date of this Note if the Buyer receives the proceeds of any life
insurance which has as its insured the Seller (other than "key man" insurance so
designated by the Buyer prior to the date of this Note [which shall not be less
than $5,000,000]) */ then Buyer shall prepay principal of this Note in the
amount of all such proceeds received by the Buyer. In addition, to the extent
that a new member of

____________________

     */  Bracketed language shall be included only if Seller is John H. Welker,
his heirs or legal representatives. the management of the Buyer who replaces
Seller is issued Common Stock (as that term is defined in the Restated Articles
of Incorporation of the Buyer) then Buyer shall prepay principal of this Note to
the extent of the net proceeds

                                     III-1

 
received by the Buyer from any such issuance. Any mandatory prepayment hereunder
shall be applied first to accrued and unpaid interest and then to installments
of principal in inverse order of maturity.

     This Note and the indebtedness evidenced hereby are subordinate and junior
in right of payment, to the extent and in the manner herein set forth, to all
Senior Debt (as hereinafter defined) of the Buyer, whether outstanding at the
date hereof or incurred hereafter, so that:

          (a)  upon any payment or distribution of assets of the Buyer of any
     kind or character, whether in cash, property or securities, to creditors in
     connection with any dissolution, winding up, total or partial liquidation
     or reorganization of the Buyer, whether voluntary or involuntary, or in
     bankruptcy, insolvency, receivership or other similar proceedings, all
     principal of, premium, if any, and interest due on all Senior Debt and all
     other charges, fees and expenses constituting a part of the Senior Debt
     shall first be paid in full in cash before the holder of this Note shall be
     entitled to receive or retain any assets (other than shares of stock of the
     Buyer as reorganized or readjusted under any plan or securities of the
     Buyer or any other corporation, the payment of which is subordinated, at
     least to the extent provided herein with respect to this Note, to the
     payment of all Senior Debt at the time outstanding and to any securities
     issued in respect thereof under any such plan of reorganization or
     readjustment) so paid or distributed in respect thereof for principal,
     premium, if any, interest or other amounts due and owing under or in
     respect to this Note);

          (b)  in the event this Note is declared due and payable before its
     expressed maturity because of the occurrence of an Event of Default (as
     hereinafter defined) (under circumstances when paragraph (a) above shall
     not be applicable) and such declaration shall not have been rescinded or
     annulled, the holders of Senior Debt outstanding at the time of such
     declaration shall be entitled to receive the principal of, premium, if any,
     and interest due on all Senior Debt and all other charges, fees and
     expenses constituting a part of the Senior Debt before the holder of this
     Note shall be entitled to receive any payment on account of the principal
     of, or interest due on, this Note or other amounts due and owing under or
     in respect to this Note;

          (c)  upon any such dissolution, winding up, liquidation or
     reorganization or in connection with any such proceedings, or upon any such
     declaration, of the nature described in paragraph (a) or (b) above, any
     payment or distribution of assets of the Buyer of any

                                     III-2

 
     kind or character, whether in cash, property or securities (other than
     shares of stock or securities as aforesaid) to which the holder of this
     Note would be entitled, but for the provisions of this Note, shall be paid
     by the Buyer or by any receiver, trustee in bankruptcy, liquidating
     trustee, agent or other person making such payment or distribution, or by
     the holder of this Note if received by it, first to the holders of Senior
     Debt described in clauses (a) and (b) of the definition thereof (pro rata
     to each such holder on the basis of the principal amounts of Senior Debt
     held by such holder) or their representatives, and then to the holders of
     Senior Debt described in clauses (c) and (d) of the definition thereof (pro
     rata to each such holder on the basis of the principal amounts of Senior
     Debt held by such holder) or their representatives, to the extent necessary
     to pay all Senior Debt in full in cash, after giving effect to any
     concurrent payment or distribution to or for the holders of Senior Debt;
     provided, however, that nothing herein contained shall restrict the holder
     of this Note, in the case of any declaration described in the foregoing
     paragraph (b), from exercising any remedies and receiving any payments if
     otherwise permitted by this Note with respect to current and overdue
     payments of interest on this Note as well as scheduled payments of
     principal on this Note (excluding non-mandatory payments of principal on
     this Note and any amounts of interest, premium, if any, and principal due
     and payable with respect to this Note solely by reason of such
     declaration);

          (d)  the Senior Debt shall continue to be treated as Senior Debt and
     the provisions herein contained shall continue to govern the relative
     rights and priorities of the holders of the Senior Debt and the holder of
     this Note notwithstanding the fact that part or all of such Senior Debt or
     the liens or security interests securing payment thereof are subordinated,
     set aside, avoided or disallowed as a result of the fraudulent conveyance
     or fraudulent transfer provisions under the United States Bankruptcy Code
     or any successor statue or any similar state statute. If post-petition
     interest on the Senior Debt is disallowed (i) as a result of such
     fraudulent conveyance or fraudulent transfer provisions or (ii) as a result
     of a court determining that the Senior Debt was undersecured, then the term
     "Senior Debt" shall nonetheless be deemed to include post-petition interest
     on the Senior Debt at the applicable rate on such Senior Debt in the
     absence of a default with respect thereto, for a period of not longer than
     three (3) years;

          (e)  the Buyer may not pay principal of, premium, if any, or interest
     on, or other amounts due and owing under or in respect of, this Note and
     may not repurchase,

                                     III-3

 
     redeem or otherwise retire this Note (collectively, "pay this Note" or the
     "payment of this Note") so long as (1) the Buyer shall be in default with
     respect to its obligation to make any payment with respect to the Senior
     Debt when due or (2) any default under the Credit Agreement between the
     Buyer and Heller Financial, Inc. dated as of this date (as amended,
     supplemented and modified from time to time, the "Heller Loan Agreement")
     (or under agreements pursuant to which Refinancing Debt (as hereafter
     defined) or other Senior Debt were issued, if applicable) shall have
     occurred and the maturity of the Senior Debt under the Heller Loan
     Agreement (or under agreements pursuant to which Refinancing Debt or other
     Senior Debt were issued, if applicable) shall have been accelerated in
     accordance with its terms unless, in either case, the default shall have
     been cured or waived, any such acceleration shall have been rescinded or
     such Senior Debt shall have been paid in full;

          (f)  during the continuance of any default (other than a default or
     acceleration described in clause (1) or (2) of paragraph (e) above) with
     respect to any Senior Debt under the Heller Loan Agreement (or under
     agreements pursuant to which Refinancing Debt or other Senior Debt were
     issued, if applicable) pursuant to which the maturity thereof may be
     accelerated immediately without further notice (except such notice as may
     be required to effect such acceleration) or upon the expiration of any
     applicable grace periods, the Buyer may not pay this Note for a period
     commencing on the date of the receipt by the Buyer and the holder of this
     Note of written notice of such default from the Agent under the Heller Loan
     Agreement (or the appropriate party under the agreement pursuant to which
     Refinancing Debt was issued, if applicable, or if no Senior Debt is
     outstanding under clauses (a) or (b) of the definition thereof, from the
     holders of a majority of the Senior Debt outstanding under either of
     clauses (c) or (d) of the definition thereof) (the "Agent") specifying an
     election to effect a payment prohibition (a "Payment Notice") and ending
     180 days following the date of receipt by such holder of such Payment
     Notice (a "Payment Bar Period" and collectively "Payment Bar Periods").
     Notwithstanding the provisions described in the immediately preceding
     sentence, unless the maturity of the Senior Debt under the Heller Loan
     Agreement (or under agreements pursuant to which the Refinancing Debt or
     other Senior Debt were issued, if applicable) shall have been accelerated,
     the Buyer shall resume payments on this Note after the expiration of the
     Other Default Payment Bar Period. The Agent may not issue any subsequent
     Payment Notice with respect to the same default or with respect to other
     defaults existing at the time of issuance of the initial Payment Notice and
     then known to the Agent, unless such

                                     III-4

 
     default(s) have been cured or waived for a period of at least 30
     consecutive days after the issuance of the initial Payment Notice and prior
     to the issuance of any subsequent Payment Notice with respect thereto.
     Furthermore, unless the maturity of the Senior Debt under the Heller Loan
     Agreement (or under agreements pursuant to which the Refinancing Debt or
     other Senior Debt were issued, if applicable) shall have been accelerated,
     the aggregate number of Payment Bar Days (as hereinafter defined) included
     in Payment Bar Periods commenced pursuant to this paragraph (f) shall not
     exceed 270 days during any period of 360 consecutive days; and if any
     Payment Bar Period would include a number of Payment Bar Days which, when
     added to the number of Payment Bar Days included in any prior Payment Bar
     Period or Periods, would result in the number of Payment Bar Days occurring
     during any period of 360 consecutive days being in excess of that permitted
     by the foregoing limitation, such Payment Bar Period shall be suspended
     following the last Payment Bar Day which is permitted to fall within such
     360-day period by the foregoing limitation and no subsequent day shall
     constitute a Payment Bar Day until the first subsequent day which may be a
     Payment Bar Day without entailing a violation of the foregoing limitation,
     it being understood and agreed to that the intent of the foregoing
     provisions of this paragraph (f) is that during any consecutive 360-day
     period the holder of this Note shall have the right, if otherwise permitted
     under this Note, to receive payment of all amounts that are overdue and
     currently owing on an unaccelerated basis in respect of this Note. For the
     purposes hereof, the term "Payment Bar Days" shall mean those days included
     in any Payment Bar Period. Nothing herein contained shall prevent (a) the
     Buyer at any time, except during the pendency of any dissolution, winding
     up, liquidation, reorganization, proceedings or declaration described
     herein, or as described in paragraph (e) and this paragraph (f), from
     making payments at any time on account of the principal of, premium, if
     any, or interest on, this Note; (b) the application by the holder of this
     Note of any money received by it from the Buyer to the payment of or on
     account of the principal of, premium, if any, or interest on, this Note if,
     at the time of such application, the Buyer or the holder of this Note shall
     not have received notice prior to such payment that such payment was
     prohibited by the subordination provisions of this Note; or (c) the Buyer
     from incurring any obligation or liability to the holder of this Note so
     long as such obligation or liability is subordinated, to the extent and on
     the conditions contained in this Note, to the prior payment in full of the
     Senior Debt;

          (g)  subject to the final payment in full in cash of all principal and
     premium, if any, and interest on all

                                     III-5

 
     Senior Debt and all other charges, fees and expensed constituting a part of
     the Senior Debt, the holder of this Note (equally and ratably with the
     holders of all other subordinated indebtedness which by its terms ranks on
     a parity with this Note and is entitled to like rights of subrogation)
     shall be subrogated to the rights of the holders of Senior Debt to receive
     payments or distributions of assets of the Buyer of any kind or character,
     whether in cash, property or securities, applicable to Senior Debt until
     the principal of, premium, if any, and interest on, this Note shall be paid
     in full; and, for the purposes of such subrogation, no such payments or
     distributions to the holders of Senior Debt of cash, securities or other
     property to which the holder of this Note would have been entitled except
     for these subordination provisions shall, as between the Buyer and its
     creditors other than the holders of Senior Debt, on the one hand, and the
     holder of this Note on the other, be deemed to be a payment by the Buyer to
     or on account of the Senior Debt, it being understood that the provisions
     herein are intended solely for the purpose of defining the relative rights
     of the holder of this Note, on the one hand, and the holders of Senior
     Debt, on the other hand, and nothing herein contained is intended to or
     shall impair, as between the buyer and its creditors other than the holders
     of Senior Debt, on the one hand, and the holder of this Note, on the other,
     the obligation of the Buyer, which is unconditional and absolute, to pay to
     the holder of this Note the principal of, premium, if any, and interest on,
     this Note as and when the same shall become due and payable in accordance
     with its terms, or is intended to or shall affect the relative rights of
     the holder of this Note and the creditors of the Buyer other than the
     holders of Senior Debt, nor shall anything herein or therein prevent the
     holder of this Note from exercising all remedies otherwise permitted by
     applicable law upon any Event of Default, subject to the rights, if any,
     under this Note of the holders of Senior Debt in respect of assets of the
     Buyer of any kind or character, whether in cash, property or securities,
     received upon the exercise of any such remedy;

          (h)  the holder of this Note by its acceptance hereof (a) irrevocably
     authorizes and empowers (but without imposing any obligation on) each
     holder of any Senior Debt described in clauses (a) and (b) of the
     definition thereof, or, if no such Senior Debt is outstanding, then each
     holder of Senior Debt described in clauses (c) and (d) of the definition
     thereof (for purposes of this paragraph, a "Senior Holder") at the time
     outstanding, and such Senior Holder's representatives, if the holder of
     this Note shall fail to do so prior to 30 days before the expiration of the
     time

                                     III-6

 
     to file any claims, to file and prove (but not to vote) all claims of the
     holder of this Note for payments or distributions in respect of this Note
     which are required to be paid or delivered to the Senior Holders as
     provided in paragraph (a) above, in the name of the holder of this Note or
     otherwise, as such Senior Holder or such Senior Holder's representatives
     may determine to be necessary or appropriate for the enforcement of the
     provisions of paragraph (a) above; and (b) agrees to execute and deliver to
     each Senior Holder, and such Senior Holder's representatives, all such
     further instruments confirming the authorization hereinabove set forth, and
     all such proofs of claim, assignments of claim and other instruments (but
     the holder of this Note shall not be required to give any Senior Holder a
     power of attorney), and to take such other action, as may be reasonably
     requested by such Senior Holder or such Senior Holder's representatives in
     order to enable such Senior Holder to enforce all claims of the holder of
     this Note upon or in respect of payments or distributions in respect of
     this Note. Any Senior Holder taking any action permitted by this paragraph
     shall give notice thereof to the holder of this Note. The holder of this
     Note by its acceptance hereof acknowledges and agrees that (a) each holder
     of Senior Debt (whether such Senior Debt is heretofore or hereafter
     existing) shall have acquired or will acquire such Senior Debt in reliance
     upon the covenants and provisions of this Note, and (b) the provisions of
     this Note may not be amended without the consent of the holders of two-
     thirds of each of: (i) the then outstanding principal amount of the Senior
     Debt under clauses (a) and (b) of the definition thereof, (ii) the then
     outstanding principal amount of the Senior Debt under clause (c) of the
     definition thereof and (iii) the then outstanding principal amount of the
     Senior Debt under clause (d) of the definition thereof;

          (i)  no right of any present or future holder of any Senior Debt to
     enforce subordination as herein provided shall at any time in any way be
     prejudiced or impaired by any act or failure to act on the part of the
     Buyer or by any act or failure to act, in good faith, by any such holder,
     or by any non-compliance by the Buyer with the terms, provisions and
     covenants of this Note, regardless of any knowledge thereof any such holder
     may have or be otherwise charged with. Without in any way limiting the
     generality of the preceding sentence, the holders of the Senior Debt may,
     at any time and from time to time, without the consent of or notice to the
     holder of this Note, without incurring responsibility to the holder of this
     Note and without impairing or releasing the subordination provided in this
     Note or the obligations of the holder of this Note to the holders of Senior
     Debt, do any one or more of the following: (a) change the manner,

                                     III-7

 
     place or terms of payment of, or renew or alter, any Senior Debt, or
     otherwise amend or supplement in any manner (other than to increase the
     principal amount of the Senior Debt described in clauses (a) and (b) of the
     definition thereof to an amount in excess of the Maximum Heller Amount (as
     hereinafter defined)), any Senior Debt or any instrument evidencing the
     same or any agreement under which Senior Debt is outstanding; (b) sell,
     exchange, release or otherwise deal with any property pledged, mortgaged or
     otherwise deal with any property pledged, mortgaged or otherwise securing
     any Senior Debt; (c) release any person liable in any manner for the
     collection of any Senior Debt; and (d) exercise or refrain from exercising
     any rights against the Buyer or any other person; and

          (j)  upon any payment or distribution of assets of the Buyer referred
     to in this Note, the holder of this Note shall be entitled to rely upon any
     order or decree entered by any court of competent jurisdiction in which any
     insolvency, bankruptcy, receivership, liquidation, reorganization,
     dissolution, winding up or similar case or proceeding is pending, or a
     certificate of the trustee in bankruptcy, liquidating trustee, custodian,
     receiver, assignee for the benefit of creditors, agent or other person
     making such payment or distribution, delivered to the holder of this Note,
     for the purpose of ascertaining the persons entitled to participate in such
     payment or distribution, the holders of the Senior Debt and other
     indebtedness of the Buyer, the amount thereof or payable thereon, the
     amount or amounts paid or distributed thereon and all other facts pertinent
     thereto or to this Note.

For purposes of this Note, the term "Senior Debt" shall mean and include (a) all
Obligations, as defined in the Heller Loan Agreement, the aggregate principal
amount of which shall at no time exceed the sum of (i) $49,900,000 (less the
amount, if any, by which the total Revolving Loan Commitment, as defined in the
Heller Loan Agreement, is permanently reduced by the Company in accordance with
the Heller Loan Agreement, and less the aggregate amount of principal payments
made with respect to the Term Loan and the Bridge Loan, each as defined in the
Heller Loan Agreement) outstanding at any time together with all other
reasonable and customary fees and expenses payable pursuant to the Heller Loan
Agreement, and (ii) $20,000,000 (the amounts set forth in the foregoing clauses
(i) and (ii) being referred to herein as the "Maximum Heller Amount"), and (b)
renewals or extensions of such Obligations or refinancing in substitution for
the Obligations (as defined in the Heller Loan Agreement) in an aggregate
principal amount not to exceed, together with the Obligations then outstanding
under the Heller Loan Agreement, the Maximum Heller Amount (the "Refinancing
Debt"), (c) the Indebtedness (as defined in that

                                     III-8

 
certain Junior Subordinated Note Purchase Agreement by and among the Buyer,
Norwest Equity Partners IV, Greylock Investments Limited Partnership, Greylock
Limited Partnership and Heller Financial, Inc., dated ___________, 1990 (the
"Junior Subordinated Note Purchase Agreement")), including accrued interest
thereon, evidenced by the Senior Subordinated Notes (as defined in the Junior
Subordinated Note Purchase Agreement) in the aggregate principal amount of
$11,000,000.00 and all other Obligations (as defined in the Senior Subordinated
Note Purchase Agreement by and among Buyer, Norwest Equity Partners IV, Greylock
Investments Limited Partnership, Greylock Limited Partnership, Heller Financial,
Inc. and certain instrumentalities of the State of Michigan, dated ____________,
1990), and (d) the indebtedness (including accrued interest thereon) evidenced
by the Seller Subordinated Notes (as defined in the Junior Subordinated Note
Purchase Agreement) in an aggregate principal amount of $____________. Copies of
all agreements referred to in this Note are on file at the principal executive
office of the Buyer and may be inspected during reasonable business hours by the
holder of this Note.

     Each of the following shall constitute an Event of Default hereunder:

          (a)  the Buyer shall default in the payment of any installment of
     principal on this Note when due and such non-payment is not because of
     legal or contractual restrictions on such payment; or

          (b)  the Buyer shall default in the payment of any interest on this
     Note when due and such non-payment is not because of legal or contractual
     restrictions on such payment; or

          (c)  a proceeding shall have been instituted in a court having
     jurisdiction in the premises seeking a decree or order for relief in
     respect of the Buyer in an involuntary case under any applicable
     bankruptcy, insolvency or other similar law now or hereafter in effect, or
     for the appointment of a receiver, liquidator, assignee, custodian,
     trustee, sequestrator (or similar official) of the Buyer or for any
     substantial part of its property, or for the winding-up or liquidation of
     its affairs, and such proceeding shall remain undismissed or unstayed and
     in effect for a period of ninety consecutive days or such court shall enter
     a decree or order granting the relief sought in such proceeding which is
     not stayed; or

          (d)  the Buyer shall commence a voluntary case under any applicable
     bankruptcy, insolvency or other similar law now or hereafter in effect,
     shall consent to the entry of an order for relief in an involuntary case
     under

                                     III-9

 
     any such law, or shall consent to the appointment of or taking possession
     by a receiver, liquidator, assignee, trustee, custodian, sequestrator (or
     other similar official) of the Buyer or for any substantial part of its
     property, or shall make a general assignment for the benefit of creditors,
     or shall fail generally to pay its debts as they become due.

     The following are the consequences of an Event of Default:

          (i)    Principal Defaults. If an Event of Default specified in
     paragraph (a) above shall occur and continue for thirty (30) days, the
     holder of this Note may, at its option, by notice in writing to the Buyer,
     declare the unpaid principal of this Note, together with interest accrued
     and unpaid thereon, to be forthwith due and payable, and the same shall
     thereupon become and be immediately due and payable.

          (ii)   Interest Defaults. If an Event of Default specified in
     paragraph (b) above shall occur and continue for sixty (60) days, the
     holder of this Note may, at its option, by notice in writing to the Buyer,
     declare the unpaid principal of this Note together with interest accrued
     and unpaid thereon, to be forthwith due and payable, and the same shall
     thereupon become and be immediately due and payable.

          (iii)  Bankruptcy. If an Event of Default specified in paragraph (c)
     or (d) above shall occur, the unpaid principal of this Note, together with
     interest accrued and unpaid thereon, shall be immediately due and payable.

     The rights and remedies of the holder of this Note upon the occurrence of
an Event of Default set forth above are in addition to and not in derogation of
any other rights such holder may have under applicable law and other agreements.

     This Note shall be governed by the laws of the State of Michigan, without
giving effect to principles of conflicts of laws thereof.

     The Buyer and each endorser hereby waives presentment, demand, protest,
notice of non-payment, dishonor and notice of dishonor.

     All notices hereunder shall be deemed to have been delivered and received,
and to be effective for all purposes, when delivered personally to, and actually
received by, the party entitled to such notice or upon deposit in an official
depository of the United States Mail when sent by registered or certified mail,
return receipt requested, sufficient

                                    III-10

 
postage affixed, to the following addresses (or such other addresses as the
parties may hereafter designate in writing and give notice of as herein
provided):

If to Seller:       ______________________________
                    ______________________________
                    ______________________________
                    ______________________________


If to Buyer:        ______________________________
                    ______________________________
                    ______________________________
                    ______________________________


                                        NUMATICS ACQUISITION CORPORATION


                                        By
                                          ----------------------------------

                                             Its 
                                                ----------------------------


                                    III-11

 
                                 ATTACHMENT IV

                                REDEMPTION NOTE


$______________                                                ___________, 19__


     FOR VALUE RECEIVED, the undersigned, John H. Welker (the "Buyer"), hereby
promises to pay to the order of _________________________________, (the
"Seller"), the principal sum of $____________ in three (3) consecutive equal
annual installments of $___________ each, commencing on that date which is the
third anniversary of the date of this Note and continuing thereafter on each
anniversary of the date of this Note through and including the date which is the
fifth anniversary of the date of this Note at which time all remaining principal
and accrued interest thereon shall be due and payable in full. Interest shall
accrue on the unpaid principal balance hereof from the date hereof at the rate
per annum equal to the Applicable Federal Rate (hereinafter defined) (computed
on the basis of a 360-day year, 30-day month) and shall be payable annually on
________________ of each year, commencing _______________, 19__ and continuing
until payment in full of the principal hereof.

     "Applicable Federal Rate" means the lowest per annum interest rate allowed
under Section 1274(d) of the Internal Revenue Code of 1986, as amended, as
determined for a month in which an interest payment hereunder shall be due and
payable.

     This Note is prepayable in whole or in part, at any time and from time to
time, at the option of the Buyer, without premium. Any optional prepayment shall
be applied first to accrued and unpaid interest and then to installments of
principal in such order as the Buyer may elect.

     Each of the following shall constitute an Event of Default hereunder:

          (a)  the Buyer shall default in the payment of any installment of
     principal on this Note when due; or

          (b)  the Buyer shall default in the payment of any interest on this
     Note when due; or

          (c)  a proceeding shall have been instituted in a court having
     jurisdiction in the premises seeking a decree or order for relief in
     respect of the Buyer in an involuntary case under any applicable
     bankruptcy, insolvency or other similar law now or hereafter in effect, or
     for the appointment of a receiver, liquidator, assignee, custodian,
     trustee, sequestrator (or similar official) of the Buyer or for any
     substantial part of his

                                     IV-1

 
     property, or for the winding-up or liquidation of his affairs, and such
     proceeding shall remain undismissed or unstayed and in effect for a period
     of ninety (90) consecutive days or such court shall enter a decree or order
     granting the relief sought in such proceeding which is not stayed; or

          (d)  the Buyer shall commence a voluntary case under any applicable
     bankruptcy, insolvency or other similar law now or hereafter in effect,
     shall consent to the entry of an order for relief in an involuntary case
     under any such law, or shall consent to the appointment of or taking
     possession by a receiver, liquidator, assignee, trustee, custodian,
     sequestrator (or other similar official) of the Buyer or for any
     substantial part of his property, or shall make a general assignment for
     the benefit of creditors, or shall fail generally to pay his debts as they
     become due.

     The following are the consequences of an Event of Default:

          (i)    Principal Defaults. If an Event of Default specified in
     paragraph (a) above shall occur and continue for thirty (30) days, the
     holder of this Note may, at its option, by notice in writing to the Buyer,
     declare the unpaid principal of this Note, together with interest accrued
     and unpaid thereon, to be forthwith due and payable, and the same shall
     thereupon become and be immediately due and payable.

          (ii)   Interest Defaults. If an Event of Default specified in
     paragraph (b) above shall occur and continue for sixty (60) days, the
     holder of this Note may, at its option, by notice in writing to the Buyer,
     declare the unpaid principal of this Note together with interest accrued
     and unpaid thereon, to be forthwith due and payable, and the same shall
     thereupon become and be immediately due and payable.

          (iii)  Bankruptcy. If an Event of Default specified in paragraph (c)
     or (d) above shall occur, the unpaid principal of this Note, together with
     interest accrued and unpaid thereon, shall be immediately due and payable.

     The rights and remedies of the holder of this Note upon the occurrence of
an Event of Default set forth above are in addition to and not in derogation of
any other rights such Seller may have under applicable law and other agreements.

     This Note shall be governed by the laws of the State of Michigan, without
giving effect to principles of conflicts of laws thereof.

                                     IV-2

 
     The Buyer and each endorser hereby waives presentment, demand, protest,
notice of non-payment, dishonor and notice of dishonor.

     All notices hereunder shall be deemed to have been delivered and received,
and to be effective for all purposes, when delivered personally to, and actually
received by, the party entitled to such notice or upon deposit in an official
depository of the United States Mail when sent by registered or certified mail,
return receipt requested, sufficient postage affixed, to the following addresses
(or such other addresses as the parties may hereafter designate in writing and
give notice of as herein provided):

If to Seller:       ______________________________
                    ______________________________
                    ______________________________
                    ______________________________


If to Buyer:        ______________________________
                    ______________________________
                    ______________________________
                    ______________________________



                                        ------------------------------
                                        John H. Welker

                                     IV-3

 
                   Attachment V to Stock Transfer Agreement
                   ----------------------------------------

                               OPTION AGREEMENT
                               ----------------
 
     THIS OPTION AGREEMENT, made and entered into as of this _____ day of
___________, _____, by and between NUMATICS ACQUISITION CORPORATION, a Michigan
corporation (the "Company"), and ______________________, individually.

                                  WITNESSETH:
                                  -----------

     WHEREAS, a Stock Transfer Agreement has been executed and delivered as of
November ___, 1990 by and between the Company; Northwest Equity Partners IV;
Greylock Investments Limited Partnership; Greylock Limited Partnership; State
Treasurer of the State of Michigan, Custodian of Public School Employees'
Retirement System; State Employees' Retirement System; Michigan State Police
Retirement System; Judges' Retirement System; Probate Judges' Retirement System;
Heller Financial, Inc.; John E. Acuff; William L. Behan; Roy A. Clark; David K.
Dodds; Henry Fleischer; Donald E. McGeachy; Robert P. Robeson; and John H.
Welker (the "Stock Transfer Agreement"); and

     WHEREAS, pursuant to the terms of the Stock Transfer Agreement, in the
event that any shares of Class A Stock or Class C Stock of the Company which are
owned of record by any Management Shareholder (this and other capitalized terms
not otherwise defined herein having the respective meanings set forth in the
Stock Transfer Agreement) other than Welker, are purchased and redeemed by the
Company pursuant to Section 2.3, 2.4 or 2.6 thereof, the Company has agreed to
grant to the Chief Executive Officer of the Company, or such present or
prospective officers or employees as may be specified in writing by him, an
option to purchase the number of authorized but unissued shares of Class A Stock
or Class C Stock of the Company so purchased or redeemed by the Company;

     WHEREAS, this Agreement is being executed and delivered by the Company
pursuant to Section 2.5 of the Stock Transfer Agreement;

     NOW, THEREFORE, in consideration of the premises and of the mutual
undertakings and promises herein contained, and other good and valuable
consideration the receipt and adequacy is hereby acknowledged, the parties
hereto agree as follows:

     1.   On the date hereof, the Company hereby gives and grants to Optionee
(as defined in Section 4 hereof), on the terms and conditions hereinafter set
forth and in accordance with the provisions of the Stock Transfer Agreement, an
irrevocable option (the "Option") to purchase _____ authorized but unissued
shares of Class __ Stock of the Company, subject to adjustment as set forth in
Section 7 below, at an exercise

                                      V-1

 
price of $_________ per share, subject to Adjustment as set forth in Section 7
below.

     2.   Subject to the other provisions hereof, Optionee may exercise all or
any part of the Option at any time and from time to time by giving notice of
exercise to the Chief Executive Officer of the Company. Each exercise of the
Option shall be effective upon the actual receipt of such notice by the Chief
Executive Officer of the Company. Optionee shall not be entitled to any rights
or privileges of a shareholder of the Company in respect of any shares issuable
upon any exercise of the Option, nor shall any other person entitled to exercise
the Option be entitled to such rights and privileges, unless and until
certificates representing the shares as to which the Option shall have been
exercised shall have been issued and delivered. Forthwith, upon receipt of such
notice of exercise, the Company shall cause the necessary certificates to be
prepared and shall promptly thereafter notify Optionee that such certificates
are available for delivery and shall, within seven days after the receipt of the
notice of exercise from Optionee, make such certificates available at the office
of the Company. Optionee, within five days after the delivery of notice to him
of the availability of the certificates, shall take up and pay in cash the
purchase price of the shares of Class A Stock or Class C Stock as to which he
shall have exercised the Option and the Company will cause the certificates to
be delivered against the receipt of the purchase price therefor.

     3.   */ [The Option granted hereunder may be transferred or assigned to any
present or prospective officer or employee of the Company, provided that any
such employee or officer who is not a Management Shareholder (as defined below)
first does all of the following: (i) executes and delivers to the Company a
Supplement to the Stock Transfer Agreement in substantially the form of
Attachment II thereto, appropriately completed, (ii) executes and delivers a
supplement to the Voting Agreement dated as of November __, 1990 (the "Voting
Agreement") among the Company and the Management Shareholders and a proxy as
described in Section 4.11 of the Voting Agreement, and (iii) executes and
delivers the written agreement contemplated in Section 3.3 of the Common Stock
Co-Sale and Shareholder Agreement dated as of November

____________________

     */  Paragraph to be inserted only into Option Agreement delivered to Chief
Executive Officer of the Company. __, 1990 among the Company and certain
shareholders (the "Co-Sale Agreement") and (iv) executes and delivers a written
agreement to be bound by the Put and Call Agreement (as defined in the Stock
Transfer Agreement).] **/[The Option shall not be transferable by Optionee.]

                                      V-2

 
     4.   The Option may only be exercised by Optionee. For the purpose of this
Agreement, "Optionee" shall mean and include, the person identified on page 1
hereof, and the heirs, successors and assigns permitted under the Stock Transfer
Agreement, the trustee of any trust for the benefit of such person, the executor
or administrator of the estate of any such person, or any personal
representative, conservator, executor, successor, trustee of such person, or any
other person charged with the custody, administration or deposition of the
assets of such person, all of whom by succession the right in the Option shall
become bound by the terms of this Agreement and the Stock Transfer Agreement.

     5.   The Option may be exercised at any time and from time to time by
Option, in whole or in part, until such time as the Company or any other party
to the Stock Transfer Agreement shall have exercised any rights under Sections
2.3 or 2.4 of the Stock Transfer Agreement concerning the Option. The provisions
of Sections 2.3 and 2.4 of the Stock Transfer Agreement shall apply to the
Option to the extent not exercised at the time of the occurrence of the event
giving rise to the redemption and/or buy-sell rights set forth therein as if the
Option had been previously exercised except the per share redemption or purchase
price determined in accordance with such provisions shall be redeemed by an
amount equal to the per share option exercise price of the Option.

     6.   In the event of the proposed dissolution of liquidation of the Company
or in the event of a proposed sale of substantially all of the assets of the
Company or in the event of a proposed merger or consolidation of the Company
with or into any other corporation, regardless of whether the Company is the
surviving corporation, or a statutory share exchange involving capital stock of
the Company or any other Sale Transaction pursuant to the Co-Sale Agreement (the
actual effective date of the dissolution, liquidation, sale, merger,
consolidation or exchange being herein called an "Event"):


____________________

     **/  Paragraph to be inserted in Option Agreement delivered to any person
other than Chief Executive Officer of the Company.


                                      V-3

 
          (a)  if the Event is a merger or consolidation or statutory share
     exchange, the Board, unless it shall make a declaration pursuant to
     paragraph 6(b), shall make appropriate provision for the protection of the
     Option (if the Board determines that such provision is reasonably necessary
     for the protection of the Option) by the substitution of option(s) and
     appropriate voting common stock of the corporation surviving any merger or
     consolidation or, if appropriate, the parent corporation of the Company or
     such surviving corporation, to be issuable upon the exercise of options in
     lieu of options and capital stock of the Company; or

          (b)  the Board of Directors of the Company may, but shall not be
     obligated to, at least 30 days prior to the occurrence of an Event,
     declare, and provide written notice to each Optionee of the declaration,
     that the Option shall be cancelled at the time of, or immediately prior to
     the occurrence of, an Event (unless it shall have been exercised prior to
     the occurrence of the Event) in exchange for payment to the Optionee at the
     time of the Event, of cash equal to the amount (if any), for each share
     covered by the cancelled option, by which the Fair Market Value (as
     hereinafter defined in this paragraph 6(b)) per share exceeds the exercise
     price per share covered by the Option. In the event of a declaration
     pursuant to this paragraph 6(b), the Option shall be cancelled at the time
     of, or immediately prior to, the Event, as provided in the declaration,
     subject to the payment obligations of the Company provided in this
     paragraph 6(b). For purposes of this paragraph, "Fair Market Value" per
     share shall mean the cash plus the fair market value, as determined in good
     faith by the Board of Directors of the Company, of the non-cash
     consideration to be received per share by the shareholders of the Company
     upon the occurrence of the Event.

          The Board of Directors of the Company shall not be obligated to take
     any action pursuant to paragraph 6(a) or 6(b) prior to, at the time of, or
     after an Event unless the Event is a merger, consolidation or statutory
     share exchange and the Board determines that such provision is reasonably
     necessary for the protection of the options.

     7.   In the event that, prior to the delivery by the Company of shares of
Class A Stock or Class C Stock in respect of which the Option has been granted,
a reorganization, recapitalization, stock split, stock dividend, combination of
shares, merger, consolidation, rights offering, or any other change in the
corporate structure or shares of the Company shall take place, the Board of
Directors of the Company shall make such equitable adjustment in the number and
kind of

                                      V-4

 
shares and option price therefor covered by the Option as it shall deem
appropriate.

     8.   Optionee represents and warrants that any and all shares of Class A
Stock or Class C Stock of the Company purchased upon any and all exercises of
the Option shall be acquired for investment and not with a view to or for sale
in connection with any distribution thereof. Optionee understands and agrees
that the shares of Class A Stock or Class C Stock to be purchased upon exercise
of the Option will not have been registered under the Securities Act of 1933, as
amended (the "Securities Act") or any applicable state securities laws and that
such shares may not be transferred or resold without (a) such registration under
the Securities Act and any applicable state securities laws or (b) any exemption
from the requirements thereof. Each notice of exercise of the Option shall be
deemed to constitute a representation by Optionee that the shares of Class A
Stock or Class C Stock with respect to which the Option is being exercised will
be acquired in good faith for investment and not with a view to or for sale in
connection with any distribution thereof and an agreement that such shares will
not be transferred or resold without registration under the Securities Act and
any applicable state securities laws or exemption therefrom. There shall be
furnished with each notice of exercise of the Option such documents as the
Company in its discretion may deem necessary to insure compliance with the
applicable rules and regulations of any governmental authority having
jurisdiction over the issuance and exercise of the Option or the issuance of
shares pursuant to any exercise thereof. In addition to any other legends deemed
appropriate by the Company, certificates delivered to evidence shares purchased
pursuant to this Agreement shall contain legends substantially to the effect set
forth on Exhibit 1 hereto:

     9.   This Option Agreement shall be governed in all respects, whether as to
validity, construction, capacity, performance or otherwise, under the laws of
the State of Michigan.

     10.  In the event that any provision hereof shall be determined to be
invalid or unenforceable for any reason, such invalidity or unenforceability
shall not affect the validity and enforceability of the remaining valid and
enforceable provisions hereof, which shall be construed as if such invalid or
unenforceable provisions had not been included in this Option Agreement.

     11.  This Option Agreement may be executed in several counterparts, each of
which shall be deemed an original, but together they shall constitute one and
the same instrument.

     IN WITNESS WHEREOF, the Company has caused this Option Agreement to be
executed by its officers thereunto duly

                                      V-5

 
authorized, and Optionee executed this Option Agreement, all as of the day and
year first above written.

                                        NUMATICS ACQUISITION CORPORATION


                                        By 
                                          -------------------------------
     
                                        Its -----------------------


                                        ---------------------------------
                                        [Optionee]


                                      V-6

 
                      EXHIBIT 1 TO STOCK OPTION AGREEMENT

                                    LEGENDS


THE COMPANY WILL FURNISH TO A SHAREHOLDER UPON REQUEST AND WITHOUT CHARGE A FULL
STATEMENT OF THE DESIGNATION, RELATIVE RIGHTS, PREFERENCES AND LIMITATIONS OF
THE SHARES OF EACH CLASS AUTHORIZED TO BE ISSUED AND THE DESIGNATION, RELATIVE
RIGHTS, PREFERENCES, AND LIMITATIONS OF EACH SERIES SO FAR AS THE SAME HAVE BEEN
PRESCRIBED AND THE AUTHORITY OF THE BOARD TO DESIGNATE AND PRESCRIBE THE
RELATIVE RIGHTS, PREFERENCES, AND LIMITATIONS OF OTHER SERIES.

THE SECURITIES EVIDENCED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED UNDER THE
SECURITIES ACT OF 1933 OR THE SECURITIES LAWS OF ANY STATE AND MAY NOT BE SOLD,
TRANSFERRED, ASSIGNED, OFFERED, PLEDGED OR OTHERWISE DISTRIBUTED FOR VALUE
UNLESS THERE IS AN EFFECTIVE REGISTRATION STATEMENT UNDER SUCH ACT AND ANY
APPLICABLE STATE SECURITIES LAWS COVERING SUCH SECURITIES OR THE COMPANY
RECEIVES AN OPINION OF COUNSEL FOR THE HOLDER OF THESE SECURITIES (CONCURRED IN
BY COUNSEL FOR THE COMPANY) STATING THAT SUCH SALE, TRANSFER, ASSIGNMENT, OFFER,
PLEDGE OR OTHER DISTRIBUTION FOR VALUE IS EXEMPT FROM THE REGISTRATION AND
PROSPECTUS DELIVERY REQUIREMENTS OF SUCH ACT AND ANY APPLICABLE STATE SECURITIES
LAWS.

THE SHARES REPRESENTED BY THIS CERTIFICATE ARE SUBJECT TO AN IRREVOCABLE PROXY
AND TO CERTAIN VOTING AGREEMENTS AS GRANTED AND PROVIDED IN A CERTAIN VOTING
AGREEMENT (THE "VOTING AGREEMENT") DATED AS OF NOVEMBER _____, 1990, BY AND
BETWEEN THE COMPANY AND CERTAIN SHAREHOLDERS OF THE COMPANY. THE VOTING
AGREEMENT PROVIDES, AMONG OTHER THINGS, THAT (i) THE SHARES REPRESENTED BY THIS
CERTIFICATE WILL BE VOTED IN SUCH MANNER AS MAY BE DIRECTED BY JOHN H. WELKER,
AND (ii) THE VOTING AGREEMENTS SET FORTH IN THE VOTING AGREEMENT WILL CONTINUE
TO APPLY TO TRANSFEREES.

THE SECURITIES REPRESENTED BY THIS CERTIFICATE ARE SUBJECT TO CERTAIN
RESTRICTIONS ON TRANSFER AND ENCUMBRANCE AND RIGHTS OF FIRST REFUSAL AND OFFER
AS GRANTED AND PROVIDED IN A CERTAIN STOCK TRANSFER AGREEMENT DATED AS OF
NOVEMBER __, 1990, BY AND BETWEEN THE COMPANY AND HOLDERS OF CERTAIN SECURITIES
OF THE COMPANY.

THE SHARES EVIDENCED BY THIS CERTIFICATE AND ANY TRANSFER THEREOF ARE SUBJECT TO
THE TERMS OF A CERTAIN COMMON STOCK CO-SALE AND SHAREHOLDER AGREEMENT AND A
REGISTRATION RIGHTS AGREEMENT AMONG THE COMPANY AND CERTAIN SHAREHOLDERS DATED
AS OF NOVEMBER ___, 1990 (INCLUDING CERTAIN VOTING AGREEMENTS UPON THE
OCCURRENCE AT CERTAIN EVENTS SPECIFIED THEREIN).

THE SHARES EVIDENCED BY THIS CERTIFICATE ARE SUBJECT TO THE TERMS OF A CERTAIN
PUT AND CALL AGREEMENT AMONG THE COMPANY AND CERTAIN SHAREHOLDERS OF THE
COMPANY, DATED AS OF NOVEMBER __, 1990.

 
THESE LEGENDS PROVIDE ONLY SUMMARY INFORMATION REGARDING THE AGREEMENTS REFERRED
TO, WHICH SUMMARIES ARE EQUALIFIED IN THEIR ENTIRETY BY REFERENCE TO THE
AGREEMENTS. COPIES OF THE FOREGOING DOCUMENTS ARE ON FILE WITH THE SECRETARY OF
THE COMPANY AT THE PRINCIPAL EXECUTIVE OFFICE OF THE COMPANY.














Bracketed language shall be included only if Seller is John H. Welker, his heirs
or legal representatives.Paragraph to be inserted only into Option Agreement
delivered to Chief Executive Officer of the Company.Paragraph to be inserted in
Option Agreement delivered to any person other than Chief Executive Officer of
the Company.

                                      -2-