EXHIBIT 99.3

                                 PENTACON, INC.

                             LETTER OF TRANSMITTAL
                         FOR TENDER OF ALL OUTSTANDING
              12 1/4% SENIOR SUBORDINATED NOTES DUE 2009, SERIES A
                                IN EXCHANGE FOR
              12 1/4% SENIOR SUBORDINATED NOTES DUE 2009, SERIES B
           THAT HAVE BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933
       PURSUANT TO THE PROSPECTUS DATED ___________________________, 1999

      THE EXCHANGE OFFER AND WITHDRAWAL RIGHTS WILL EXPIRE AT 5:00 P.M., NEW
      YORK CITY TIME, ON _____________________________ , 1999 UNLESS THE
      EXCHANGE OFFER IS EXTENDED.

        TO: STATE STREET BANK AND TRUST COMPANY (THE "EXCHANGE AGENT")

                                    
                                                      BY REGISTERED OR CERTIFIED MAIL:
   BY HAND OR OVERNIGHT DELIVERY:                   State Street Bank and Trust Company
 State Street Bank and Trust Company                      Two International Place
 Two International Place, 4th Floor                             P.O. Box 778
     Boston, Massachusetts 02110                        Boston, Massachusetts 02110
      Attention: Kellie Mullen                            Attention: Kellie Mullen


                           BY FACSIMILE TRANSMISSION:
                        (for Eligible Institutions only)
                      State Street Bank and Trust Company
                                 (617) 664-5290
                            Attention: Kellie Mullen

                 FOR INFORMATION OR CONFIRMATION BY TELEPHONE:
                                 (617) 664-5587

     DELIVERY OF THIS INSTRUMENT TO AN ADDRESS OR TRANSMISSION TO A FACSIMILE
NUMBER OTHER THAN AS SET FORTH ABOVE DOES NOT CONSTITUTE A VALID DELIVERY. THE
METHOD OF DELIVERY OF ALL DOCUMENTS, INCLUDING CERTIFICATES, IS AT THE RISK OF
THE HOLDER. IF DELIVERY IS BY MAIL, REGISTERED MAIL WITH RETURN RECEIPT
REQUESTED, PROPERLY INSURED, IS RECOMMENDED. THE INSTRUCTIONS ACCOMPANYING THIS
LETTER OF TRANSMITTAL SHOULD BE READ CAREFULLY BEFORE THIS LETTER OF TRANSMITTAL
IS COMPLETED.
     The undersigned acknowledges that he or she has received the Prospectus,
dated ___________________________, 1999 (the "Prospectus") of Pentacon, Inc.,
a Delaware Corporation (the "Company") and this Letter of Transmittal and the
instructions hereto (the "Letter of Transmittal"), which together constitute
the Company's offer (the "Exchange Offer") to exchange $1,000 principal amount
of its 12 1/4% Senior Subordinated Notes due 2009, Series B (the "Exchange
Notes") that have been registered under the Securities Act of 1933, as amended
(the "Securities Act"), pursuant to a Registration Statement of which the
Prospectus is a part, for each $1,000 principal amount of its outstanding
12 1/4% Senior Subordinated Notes due 2009, Series A (the "Old Notes"), of
which $100,000,000 aggregate principal amount is outstanding, upon the terms and
subject to the conditions set forth in the Prospectus. The term "Expiration
Date" shall mean 5:00 p.m., New York City time, on ___________________________,
1999, unless the Company, in its sole discretion, extends the Exchange Offer, in
which case the term shall mean the latest date and time to which the Exchange
Offer is extended by the Company.

     This Letter of Transmittal is to be used either if (i) certificates
representing Old Notes are to be physically delivered to the Exchange Agent
herewith by Holders, (ii) tender of Old Notes is to be made by book-entry
transfer to an account maintained by the Exchange Agent at The Depository Trust
Company ("DTC"), pursuant to the procedures set forth in "The Exchange
Offer -- Procedures for Tendering" in the Prospectus by any financial
institution that is a participant in DTC and whose name appears on a security
position listing as the owner of Old Notes or (iii) tender of

Old Notes is to be made according to the guaranteed delivery procedures set
forth in the Prospectus under "The Exchange Offer -- Guaranteed Delivery
Procedures." Delivery of this Letter of Transmittal and any other required
documents must be made to the Exchange Agent. DELIVERY OF DOCUMENTS TO DTC DOES
NOT CONSTITUTE DELIVERY TO THE EXCHANGE AGENT.

     The term "Holder" as used herein means any person in whose name Old Notes
are registered on the books of the Company or any other person who has obtained
a properly completed bond power from the registered holder.

     All Holders of Old Notes who wish to tender their Old Notes must, prior to
the Expiration Date: (1) complete, sign, and deliver this Letter of Transmittal,
or a facsimile thereof, to the Exchange Agent, in person or to the address set
forth above; and (2) tender (and not withdraw) his or her Old Notes or, if a
tender of Old Notes is to be made by book-entry transfer to the account
maintained by the Exchange Agent at DTC, confirm such book-entry transfer (a
"Book-Entry Confirmation"), in each case in accordance with the procedures for
tendering described in the instructions to this Letter of Transmittal. Holders
of Old Notes whose certificates are not immediately available, or who are unable
to deliver their certificates or Book-Entry Confirmation and all other documents
required by this Letter of Transmittal to be delivered to the Exchange Agent on
or prior to the Expiration Date, must tender their Old Notes according to the
guaranteed delivery procedures set forth under the caption "The Exchange
Offer -- Guaranteed Delivery Procedures" in the Prospectus. (See Instruction
2.)

     Upon the terms and subject to the conditions of the Exchange Offer, the
acceptance for exchange of the Old Notes validly tendered and not withdrawn and
the issuance of the Exchange Notes will be made promptly following the
Expiration Date. For the purposes of the Exchange Offer, the Company shall be
deemed to have accepted for exchange validly tendered Old Notes when, as and if
the Company has given written notice thereof to the Exchange Agent.

     The undersigned has completed, executed and delivered this Letter of
Transmittal to indicate the action the undersigned desires to take with respect
to the Exchange Offer. Holders who wish to tender their Old Notes must complete
this Letter of Transmittal in its entirety.

     PLEASE READ THE ENTIRE LETTER OF TRANSMITTAL AND THE PROSPECTUS CAREFULLY
BEFORE CHECKING ANY BOX BELOW. THE INSTRUCTIONS INCLUDED IN THIS LETTER OF
TRANSMITTAL MUST BE FOLLOWED. QUESTIONS AND REQUESTS FOR ASSISTANCE OR FOR
ADDITIONAL COPIES OF THE PROSPECTUS, THIS LETTER OF TRANSMITTAL AND THE NOTICE
OF GUARANTEED DELIVERY MAY BE DIRECTED TO THE EXCHANGE AGENT. SEE INSTRUCTION 12
HEREIN.

     HOLDERS WHO WISH TO ACCEPT THE EXCHANGE OFFER AND TENDER THEIR OLD NOTES
MUST COMPLETE THIS LETTER OF TRANSMITTAL IN ITS ENTIRETY AND COMPLY WITH ALL OF
ITS TERMS.

                                     - 2 -

     List below the Old Notes to which this Letter of Transmittal relates. If
the space provided below is inadequate, the Certificate Numbers and Principal
Amounts should be listed on a separate signed schedule, attached hereto. The
minimum permitted tender is $1,000 in principal amount of 12 1/4% Senior
Subordinated Notes due 2009, Series A. All other tenders must be in integral
multiples of $1,000.

      DESCRIPTION OF 12 1/4% SENIOR SUBORDINATED NOTES DUE 2009, SERIES A

BOX I


NAME(S) AND ADDRESS(ES) OF REGISTERED HOLDER(S)*
         (PLEASE FILL IN, IF BLANK)
                                                                              
                                                                      (A)                 (B)

                                                                                        Aggregate
                                                                                        Principal
                                                                  Certificate        Amount Tendered
                                                                   Number(s)*       (if less than all)**

                                                                 ----------------   --------------------

                                                                 ----------------   --------------------

                                                                 ----------------   --------------------

                                                                 ----------------   --------------------

                                                                 ----------------   --------------------
                                                                 Total Principal
                                                                 Amount of Old
                                                                 Notes Tendered:

                                                                 ----------------   --------------------


- ------------
 * Need not be completed by book-entry holders.

** Need not be completed by Holders who wish to tender with respect to all Old
   Notes listed.

              PLEASE READ CAREFULLY THE ACCOMPANYING INSTRUCTIONS

BOX II                                                                   
- ------------------------------------------------------------             
                     SPECIAL REGISTRATION INSTRUCTIONS
                      (SEE INSTRUCTIONS 4, 5, 6 AND 7)
           To be completed ONLY if certificates for Old Notes in
           a principal amount not tendered, or Exchange Notes
           issued in exchange for Old Notes accepted for
           exchange, are to be issued in the name of someone
           other than the undersigned.

           Issue certificate(s) to:

           Name..................................................
                               (PLEASE PRINT)

           ......................................................

           Address...............................................
                               (PLEASE PRINT)

           ......................................................
                            (INCLUDING ZIP CODE)

           ......................................................
               (TAX IDENTIFICATION OR SOCIAL SECURITY NUMBER)
- ------------------------------------------------------------  

BOX III
- ------------------------------------------------------------
                       SPECIAL DELIVERY INSTRUCTIONS
                      (SEE INSTRUCTIONS 4, 5, 6 AND 7)

           To be completed ONLY if certificates for Old Notes in
           a principal amount not tendered, or Exchange Notes
           issued in exchange for Old Notes accepted for
           exchange, are to be delivered to someone other than
           the undersigned.
           Deliver certificate(s) to:
           Name..................................................
                               (PLEASE PRINT)
           ......................................................
           Address...............................................
                               (PLEASE PRINT)
           ......................................................
                            (INCLUDING ZIP CODE)
           ......................................................
               (TAX IDENTIFICATION OR SOCIAL SECURITY NUMBER)
- ------------------------------------------------------------

                                     - 3 -

     IMPORTANT: THIS LETTER OF TRANSMITTAL OR A FACSIMILE HEREOF (TOGETHER WITH
THE CERTIFICATE(S) FOR OLD NOTES OR A CONFIRMATION OF BOOK-ENTRY TRANSFER OF
SUCH OLD NOTES AND ALL OTHER REQUIRED DOCUMENTS) OR, IF GUARANTEED DELIVERY
PROCEDURES ARE TO BE COMPLIED WITH, A NOTICE OF GUARANTEED DELIVERY, MUST BE
RECEIVED BY THE EXCHANGE AGENT PRIOR TO THE EXPIRATION DATE.

  [ ]  CHECK HERE IF OLD NOTES ARE BEING DELIVERED BY DTC TO AN ACCOUNT
       MAINTAINED BY THE EXCHANGE AGENT WITH DTC AND COMPLETE THE FOLLOWING:
       Name of Tendering Institution _____    [ ] The Depository Trust Company
       Account Number __________________________________________________________
       Transaction Code Number _________________________________________________

     Holders whose Old Notes are not immediately available or who cannot deliver
their Old Notes and all other documents required hereby to the Exchange Agent on
or prior to the Expiration Date may tender their Old Notes according to the
guaranteed delivery procedures set forth in the Prospectus under the caption
"The Exchange Offer -- Guaranteed Delivery Procedures." (See Instruction 2.)

    [ ] CHECK HERE IF OLD NOTES ARE BEING DELIVERED PURSUANT TO A NOTICE OF
        GUARANTEED DELIVERY PREVIOUSLY SENT TO THE EXCHANGE AGENT AND COMPLETE
        THE FOLLOWING:
        Name(s) of tendering Holder(s)  ________________________________________
       Date of Execution of Notice of Guaranteed Delivery  _____________________
       Name of Institution which Guaranteed Delivery  __________________________
       Transaction Code Number  ________________________________________________

    [ ] CHECK HERE IF YOU ARE A BROKER-DEALER AND WISH TO RECEIVE 10 ADDITIONAL
        COPIES OF THE PROSPECTUS AND 10 COPIES OF ANY AMENDMENTS OR SUPPLEMENTS
        THERETO.
        Name:  _________________________________________________________________
       Address:  _______________________________________________________________

     If the undersigned is not a broker-dealer, the undersigned represents that
it is not engaged in, and does not intend to engage in, a distribution of
Exchange Notes. If the undersigned is a broker-dealer that will receive Exchange
Notes for its own account in exchange for Old Notes that were acquired as a
result of market-making activities or other trading activities, it acknowledges
that it will deliver a prospectus in connection with any resale of such Exchange
Notes; however, by so acknowledging and by delivering a prospectus, the
undersigned will not be deemed to admit that it is an "underwriter" within the
meaning of the Securities Act.

                                     - 4 -

                    NOTE: SIGNATURES MUST BE PROVIDED BELOW
                PLEASE READ ACCOMPANYING INSTRUCTIONS CAREFULLY

Ladies and Gentlemen:

     Subject to the terms and conditions of the Exchange Offer, the undersigned
hereby tenders to Pentacon, Inc. (the "Company") the principal amount of Old
Notes indicated above.

     Subject to and effective upon the acceptance for exchange of the principal
amount of Old Notes tendered hereby in accordance with this Letter of
Transmittal, the undersigned sells, assigns and transfers to, or upon the order
of, the Company all right, title and interest in and to the Old Notes tendered
hereby. The undersigned hereby irrevocably constitutes and appoints the Exchange
Agent as its agent and attorney-in-fact (with full knowledge that the Exchange
Agent also acts as the agent of the Company and as Trustee and Registrar under
the Indenture for the Old Notes and the Exchange Notes) with respect to the
tendered Old Notes with full power of substitution (such power of attorney being
deemed an irrevocable power coupled with an interest), subject only to the right
of withdrawal described in the Prospectus, to (i) deliver certificates for such
Old Notes to the Company or transfer ownership of such Old Notes on the account
books maintained by DTC, together, in either such case, with all accompanying
evidences of transfer and authenticity to, or upon the order of, the Company and
(ii) present such Old Notes for transfer on the books of the Company and receive
all benefits and otherwise exercise all rights of beneficial ownership of such
Old Notes, all in accordance with the terms of the Exchange Offer.

     The undersigned acknowledges that the Exchange Offer is being made in
reliance upon interpretative advice given by the staff of the Securities and
Exchange Commission to third parties in connection with transactions similar to
the Exchange Offer, so that the Exchange Notes issued pursuant to the Exchange
Offer in exchange for the Old Notes may be offered for resale, resold and
otherwise transferred by holders thereof (other than a broker-dealer who
purchased such Old Notes directly from the Company for resale pursuant to Rule
144A or any other available exemption under the Securities Act or a person that
is an "affiliate" of the Company or any Guarantor within the meaning of Rule
405 under the Securities Act) without compliance with the registration and
prospectus delivery provisions of the Securities Act, provided that such
Exchange Notes are acquired in the ordinary course of such holders' business and
such holders have no arrangement with any person to participate in the
distribution of such Exchange Notes.

     The undersigned agrees that acceptance of any tendered Old Notes by the
Company and the issuance of Exchange Notes in exchange therefor shall constitute
performance in full by the Company of its obligations under the registration
rights agreement, (as referred to in the Prospectus) and that, upon the issuance
of the Exchange Notes, the Company will have no further obligations or
liabilities thereunder (except in certain limited circumstances).

     The undersigned represents and warrants that (i) the Exchange Notes
acquired pursuant to the Exchange Offer are being acquired in the ordinary
course of business of the person receiving Exchange Notes (which shall be the
undersigned unless otherwise indicated in the box entitled "Special Delivery
Instructions" above) (the "Recipient"), (ii) neither the undersigned nor the
Recipient (if different) is engaged in, intends to engage in or has any
arrangement or understanding with any person to participate in the distribution
of such Exchange Notes, and (iii) neither the undersigned nor the Recipient (if
different) is an "affiliate" of the Company or any Guarantor as defined in
Rule 405 under the Securities Act. If the undersigned is not a broker-dealer,
the undersigned further represents that it is not engaged in, and does not
intend to engage in, a distribution of the Exchange Notes. If the undersigned is
a broker-dealer, the undersigned further (x) represents that it acquired Old
Notes for the undersigned's own account as a result of market-making activities
or other trading activities, (y) represents that it has not entered into any
arrangement or understanding with the Company or any "affiliate" of the
Company (within the meaning of Rule 405 under the Securities Act) to distribute
the Exchange Notes to be received in the Exchange Offer and (z) acknowledges
that it will deliver a prospectus meeting the requirements of the Securities Act
(for which purposes delivery of the Prospectus, as the same may be hereafter
supplemented or amended, shall be sufficient) in connection with any resale of
Exchange Notes received in the Exchange Offer. Such a broker-dealer will not be
deemed, solely by reason of such acknowledgment and prospectus delivery, to
admit that it is an "underwriter" within the meaning of the Securities Act.

     The undersigned understands and agrees that the Company reserves the right
not to accept tendered Old Notes from any tendering holder if the Company
determines, in its sole and absolute discretion, that such acceptance could
result in a violation of applicable securities laws.

     The undersigned hereby represents and warrants that the undersigned has
full power and authority to tender, exchange, assign and transfer the Old Notes
tendered hereby and to acquire Exchange Notes issuable upon the exchange of such
tendered Old Notes, and that, when the same are accepted for exchange, the
Company will acquire good and unencumbered title thereto, free and clear of all
liens, restrictions, charges and encumbrances and not subject to any adverse
claim. The undersigned also warrants that it will, upon request, execute and
deliver any additional documents deemed to be necessary or desirable by the
Exchange Agent or the Company in order to complete the

                                     - 5 -

exchange, assignment and transfer of tendered Old Notes or transfer of ownership
of such Old Notes on the account books maintained by a book-entry transfer
facility.

     The undersigned understands and acknowledges that the Company reserves the
right in its sole discretion to purchase or make offers for any Old Notes that
remain outstanding subsequent to the Expiration Date or, as set forth in the
Prospectus under the caption "The Exchange Offer -- Procedures for Tendering,"
to terminate the Exchange Offer and, to the extent permitted by applicable law,
purchase Old Notes in the open market, in privately negotiated transactions or
otherwise. The terms of any such purchases or offers could differ from the terms
of the Exchange Offer.

     The undersigned understands that the Company may accept the undersigned's
tender by delivering written notice of acceptance to the Exchange Agent, at
which time the undersigned's right to withdraw such tender will terminate. For
purposes of the Exchange Offer, the Company shall be deemed to have accepted
validly tendered Old Notes when, as and if the Company has given oral (which
shall be confirmed in writing) or written notice thereof to the Exchange Agent.

     The undersigned understands that the first interest payment following the
Expiration Date will include unpaid interest on the Old Notes accrued through
the date of issuance of the Exchange Notes.

     The undersigned understands that tenders of Old Notes pursuant to the
procedures described under the caption "The Exchange Offer -- Procedures for
Tendering" in the Prospectus and in the instructions hereto will constitute a
binding agreement between the undersigned and the Company upon the terms and
subject to the conditions of the Exchange Offer.

     The undersigned acknowledges that the Exchange Offer is subject to the more
detailed terms set forth in the Prospectus and, in case of any conflict between
the terms of the Prospectus and this Letter of Transmittal, the Prospectus shall
prevail.

     If any tendered Old Notes are not accepted for exchange pursuant to the
Exchange Offer for any reason, certificates for any such unaccepted Old Notes
will be returned (except as noted below with respect to tenders through DTC), at
the Company's cost and expense, to the undersigned at the address shown below or
at a different address as may be indicated herein under "Special Delivery
Instructions" as promptly as practicable after the Expiration Date.

     All authority conferred or agreed to be conferred by this Letter of
Transmittal shall survive the death, incapacity or dissolution of the
undersigned, and every obligation of the undersigned under this Letter of
Transmittal shall be binding upon the undersigned's heirs, personal
representatives, successors and assigns. This tender may be withdrawn only in
accordance with the procedures set forth in this Letter of Transmittal.

     By acceptance of the Exchange Offer, each broker-dealer that receives
Exchange Notes pursuant to the Exchange Offer hereby acknowledges and agrees
that upon the receipt of notice by the Company of the happening of any event
which makes any statement in the Prospectus untrue in any material respect or
which requires the making of any changes in the Prospectus in order to make the
statements therein not misleading (which notice the Company agrees to deliver
promptly to such broker-dealer), such broker-dealer will suspend use of the
Prospectus until the Company has amended or supplemented the Prospectus to
correct such misstatement or omission and has furnished copies of the amended or
supplemented prospectus to such broker-dealer.

     Unless otherwise indicated under "Special Registration Instructions,"
please issue the certificates representing the Exchange Notes issued in exchange
for the Old Notes accepted for exchange and return any certificates for Old
Notes not tendered or not exchanged, in the name(s) of the undersigned (or, in
either such event in the case of Old Notes tendered by DTC, by credit to the
account at DTC). Similarly, unless otherwise indicated under "Special Delivery
Instructions," please send the certificates representing the Exchange Notes
issued in exchange for the Old Notes accepted for exchange and any certificates
for Old Notes not tendered or not exchanged (and accompanying documents, as
appropriate) to the undersigned at the address shown below the undersigned's
signature(s), unless, in either event, tender is being made through DTC. In the
event that both "Special Registration Instructions" and "Special Delivery
Instructions" are completed, please issue the certificates representing the
Exchange Notes issued in exchange for the Old Notes accepted for exchange in the
name(s) of, and return any certificates for Old Notes not tendered or not
exchanged to, the person(s) so indicated. The undersigned understands that the
Company has no obligations pursuant to the "Special Registration Instructions"
or "Special Delivery Instructions" to transfer any Old Notes from the name of
the registered Holder(s) thereof if the Company does not accept for exchange any
of the Old Notes so tendered.

     Holders who wish to tender the Old Notes and (i) whose Old Notes are not
immediately available or (ii) who cannot deliver their Old Notes, this Letter of
Transmittal or any other documents required hereby to the Exchange Agent prior
to the Expiration Date, may tender their Old Notes according to the guaranteed
delivery procedures set

                                     - 6 -

forth in the Prospectus under the caption "The Exchange Offer -- Guaranteed
Delivery Procedures." See Instruction 1 regarding the completion of the Letter
of Transmittal.

                        PLEASE SIGN HERE WHETHER OR NOT
                 OLD NOTES ARE BEING PHYSICALLY TENDERED HEREBY
                    AND WHETHER OR NOT TENDER IS TO BE MADE
                 PURSUANT TO THE GUARANTEED DELIVERY PROCEDURES

     This Letter of Transmittal must be signed by the registered holder(s) as
their name(s) appear on the Old Notes or, if tendered by a participant in DTC,
exactly as such participant's name appears on a security listing as the owner of
Old Notes, or by person(s) authorized to become registered holder(s) by a
properly completed bond power from the registered holder(s), a copy of which
must be transmitted with this Letter of Transmittal. If Old Notes to which this
Letter of Transmittal relate are held of record by two or more joint holders,
then all such holders must sign this Letter of Transmittal. If signature is by a
trustee, executor, administrator, guardian, attorney-in-fact, officer of a
corporation or other person acting in a fiduciary or representative capacity,
then such person must (i) set forth his or her full title below and (ii) unless
waived by the Company, submit evidence satisfactory to the Company of such
person's authority so to act. (See Instruction 4.)

X_________________________________     ______________________________________
                                       Date
X_________________________________     ______________________________________
   Signature(s) of Holder(s) or        Date
    Authorized Signatory       


Name(s): _________________________    Address:_______________________________

         _________________________            _______________________________
               (Please Print)                       (Including Zip Code)

Capacity:_________________________    Area Code and Telephone Number:_________

Social Security No.:______________________

                   PLEASE COMPLETE SUBSTITUTE FORM W-9 HEREIN

                                     - 7 -

BOX IV
                    SIGNATURE GUARANTEE (SEE INSTRUCTION 1)
        CERTAIN SIGNATURES MUST BE GUARANTEED BY AN ELIGIBLE INSTITUTION
 ______________________________________________________________________________
             (Name of Eligible Institution Guaranteeing Signatures)
 ______________________________________________________________________________
  (Address (including zip code) and Telephone Number (including area code) of
                                     Firm)
 ______________________________________________________________________________
                             (Authorized Signature)
 ______________________________________________________________________________
                                 (Printed Name)
 ______________________________________________________________________________
                                    (Title)
 ______________________________________________________________________________

 Date:  ______________________________

                                  INSTRUCTIONS

         FORMING PART OF THE TERMS AND CONDITIONS OF THE EXCHANGE OFFER

     1.  GUARANTEE OF SIGNATURES.  Signatures on this Letter of Transmittal need
not be guaranteed if (a) this Letter of Transmittal is signed by the registered
holder(s) of the Old Notes tendered herewith and such holder(s) have not
completed the box set forth herein entitled "Special Registration
Instructions" or the box entitled "Special Delivery Instructions" or (b) such
Old Notes are tendered for the account of an Eligible Institution. (See
Instruction 6.) Otherwise, all signatures on this Letter of Transmittal or a
notice of withdrawal, as the case may be, must be guaranteed by a member firm of
a registered national securities exchange or of the National Association of
Securities Dealers, Inc. or a commercial bank or trust company having an office
or correspondent in the United States (an "Eligible Institution"). All
signatures on bond powers and endorsements on certificates must also be
guaranteed by an Eligible Institution.

     2.  DELIVERY OF THIS LETTER OF TRANSMITTAL AND OLD NOTES.  Certificates for
all physically delivered Old Notes or confirmation of any book-entry transfer to
the Exchange Agent at DTC of Old Notes tendered by book-entry transfer, as well
as, in each case (including cases where tender is affected by book-entry
transfer), a properly completed and duly executed copy of this Letter of
Transmittal or facsimile hereof and any other documents required by this Letter
of Transmittal must be received by the Exchange Agent at its address set forth
herein prior to 5:00 p.m., New York City time, on the Expiration Date.

     The method of delivery of the tendered Old Notes, this Letter of
Transmittal and all other required documents to the Exchange Agent is at the
election and risk of the Holder and the delivery will be deemed made only when
actually received by the Exchange Agent. If Old Notes are sent by mail,
registered mail with return receipt requested, properly insured, is recommended.
In all cases, sufficient time should be allowed to ensure timely delivery. No
Letter of Transmittal or Old Notes should be sent to the Company.

     The Exchange Agent will make a request to establish an account with respect
to the Old Notes at the Depositary for purposes of the Exchange Offer within two
business days after receipt of this Prospectus, and any financial institution
that is a participant in the Depositary may make book-entry delivery of Old
Notes by causing the Depositary to transfer such Old Notes into the Exchange
Agent's account at the Depositary in accordance with the Depositary's procedures
for transfer. However, although delivery of Old Notes may be effected through
book-entry transfer at the Depositary, the Letter of Transmittal, with any
required signature guarantees or an Agent's Message (as defined below) in
connection with a book-entry transfer and any other required documents, must, in
any case, be transmitted to and received by the Exchange Agent at the address
specified on the cover page of the Letter of Transmittal on or prior to the
Expiration Date or the guaranteed delivery procedures described below must be
complied with.

                                     - 8 -

     A Holder may tender Old Notes that are held through the Depositary by
transmitting its acceptance through the Depositary's Automatic Tender Offer
Program, for which the transaction will be eligible, and the Depositary will
then edit and verify the acceptance and send an Agent's Message to the Exchange
Agent for its acceptance. The term "Agent's Message" means a message
transmitted by the Depositary to, and received by, the Exchange Agent and
forming part of the Book-Entry Confirmation, which states that the Depositary
has received an express acknowledgment from each participant in the Depositary
tendering the Old Notes and that such participant has received the Letter of
Transmittal and agrees to be bound by the terms of the Letter of Transmittal and
the Company may enforce such agreement against such participant.

     Holders who wish to tender their Old Notes and (i) whose Old Notes are not
immediately available, or (ii) who cannot deliver their Old Notes, this Letter
of Transmittal or any other documents required hereby to the Exchange Agent
prior to the Expiration Date or comply with book-entry transfer procedures on a
timely basis must tender their Old Notes according to the guaranteed delivery
procedures set forth in the Prospectus. See "Exchange Offer -- Guaranteed
Delivery Procedures." Pursuant to such procedure: (i) such tender must be made
by or through an Eligible Institution; (ii) prior to the Expiration Date, the
Exchange Agent must have received from the Eligible Institution a properly
completed and duly executed Notice of Guaranteed Delivery (by facsimile
transmission, overnight courier, mail or hand delivery) setting forth the name
and address of the Holder of the Old Notes, the certificate number or numbers of
such Old Notes and the principal amount of Old Notes tendered, stating that the
tender is being made thereby and guaranteeing that, within three New York Stock
Exchange trading days after the Expiration Date, this Letter of Transmittal (or
facsimile hereof) together with the certificate(s) representing the Old Notes
and any other required documents will be deposited by the Eligible Institution
with the Exchange Agent; and (iii) such properly completed and executed Letter
of Transmittal (or facsimile hereof), as well as all other documents required by
this Letter of Transmittal and the certificate(s) representing all tendered Old
Notes in proper form for transfer (or a confirmation of book-entry transfer of
such Old Notes into the Exchange Agent's account at DTC), must be received by
the Exchange Agent within three New York Stock Exchange trading days after the
Expiration Date, all in the manner provided in the Prospectus under the caption
"The Exchange Offer -- Guaranteed Delivery Procedures." Any Holder who wishes
to tender his Old Notes pursuant to the guaranteed delivery procedures described
above must ensure that the Exchange Agent receives the Notice of Guaranteed
Delivery prior to 5:00 p.m., New York City time, on the Expiration Date. Upon
request to the Exchange Agent, a Notice of Guaranteed Delivery will be sent to
Holders who wish to tender their Old Notes according to the guaranteed delivery
procedures set forth above.

     All questions as to the validity, form, eligibility (including time of
receipt), acceptance of tendered Old Notes, and withdrawal of tendered Old Notes
will be determined by the Company in its sole discretion, which determination
will be final and binding. All tendering holders, by execution of this Letter of
Transmittal (or facsimile thereof), shall waive any right to receive notice of
the acceptance of the Old Notes for exchange. The Company reserves the absolute
right to reject any and all Old Notes not properly tendered or any Old Notes the
Company's acceptance of which would, in the opinion of counsel for the Company,
be unlawful. The Company also reserves the right to waive any irregularities or
conditions of tender as to particular Old Notes. The Company's interpretation of
the terms and conditions of the Exchange Offer (including the instructions in
this Letter of Transmittal) shall be final and binding on all parties. Unless
waived, any defects or irregularities in connection with tenders of Old Notes
must be cured within such time as the Company shall determine. Neither the
Company, the Exchange Agent nor any other person shall be under any duty to give
notification of defects or irregularities with respect to tenders of Old Notes,
nor shall any of them incur any liability for failure to give such notification.
Tenders of Old Notes will not be deemed to have been made until such defects or
irregularities have been cured to the Company's satisfaction or waived. Any Old
Notes received by the Exchange Agent that are not properly tendered and as to
which the defects or irregularities have not been cured or waived will be
returned by the Exchange Agent to the tendering Holders pursuant to the
Company's determination, unless otherwise provided in this Letter of Transmittal
as soon as practicable following the Expiration Date. The Exchange Agent has no
fiduciary duties to the Holders with respect to the Exchange Offer and is acting
solely on the basis of directions of the Company.

     3.  INADEQUATE SPACE.  If the space provided is inadequate, the certificate
numbers and/or the number of Old Notes should be listed on a separate signed
schedule attached hereto.

     4.  TENDER BY HOLDER.  Only a Holder of Old Notes may tender such Old Notes
in the Exchange Offer. Any beneficial owner of Old Notes who is not the
registered Holder and who wishes to tender should arrange with such registered
holder to execute and deliver this Letter of Transmittal on such beneficial
owner's behalf or must, prior to completing and executing this Letter of
Transmittal and delivering his Old Notes, either make appropriate arrangements
to register ownership of the Old Notes in such beneficial owner's name or obtain
a properly completed bond power from the registered holder or properly endorsed
certificates representing such Old Notes.

                                     - 9 -

     5.  PARTIAL TENDERS; WITHDRAWALS.  Tenders of Old Notes will be accepted
only in integral multiples of $1,000. If less than the entire principal amount
of any Old Notes is tendered, the tendering Holder should fill in the principal
amount tendered in the third column of the box entitled "Description of 12 1/4%
Senior Subordinated Notes due 2009, Series A" above. The entire principal
amount of any Old Notes delivered to the Exchange Agent will be deemed to have
been tendered unless otherwise indicated. If the entire principal amount of all
Old Notes is not tendered, then Old Notes for the principal amount of Old Notes
not tendered and a certificate or certificates representing Exchange Notes
issued in exchange for any Old Notes accepted will be sent to the Holder at his
or her registered address, unless a different address is provided in the
"Special Delivery Instructions" box above on this Letter of Transmittal or
unless tender is made through DTC, promptly after the Old Notes are accepted for
exchange.

     Except as otherwise provided herein, tenders of Old Notes may be withdrawn
at any time prior to 5:00 p.m., New York City time, on the Expiration Date. To
withdraw a tender of Old Notes in the Exchange Offer, a written or facsimile
transmission notice of withdrawal must be received by the Exchange Agent at its
address set forth herein prior to 5:00 p.m., New York City time, on the
Expiration Date. Any such notice of withdrawal must (i) specify the name of the
person having deposited the Old Notes to be withdrawn (the "Depositor"), (ii)
identify the Old Notes to be withdrawn (including the certificate number or
numbers and principal amount of such Old Notes, or, in the case of Old Notes
transferred by book-entry transfer the name and number of the account at DTC to
be credited), (iii) be signed by the Depositor in the same manner as the
original signature on the Letter of Transmittal by which such Old Notes were
tendered (including any required signature guarantees) or be accompanied by
documents of transfer sufficient to have the Registrar with respect to the Old
Notes register the transfer of such Old Notes into the name of the person
withdrawing the tender and (iv) specify the name in which any such Old Notes are
to be registered, if different from that of the Depositor. All questions as to
the validity, form and eligibility (including time of receipt) of such notices
will be determined by the Company, whose determination shall be final and
binding on all parties. Any Old Notes so withdrawn will be deemed not to have
been validly tendered for purposes of the Exchange Offer and no Exchange Notes
will be issued with respect thereto unless the Old Notes so withdrawn are
validly retendered. Any Old Notes which have been tendered but which are not
accepted for exchange by the Company will be returned to the Holder thereof
without cost to such Holder as soon as practicable after withdrawal, rejection
of tender or termination of the Exchange Offer. Properly withdrawn Old Notes may
be retendered by following one of the procedures described in the Prospectus
under "The Exchange Offer -- Procedures for Tendering" at any time prior to
the Expiration Date.

     6.  SIGNATURES ON THE LETTER OF TRANSMITTAL; BOND POWERS AND
ENDORSEMENTS.  If this Letter of Transmittal (or facsimile hereof) is signed by
the registered holder(s) of the Old Notes tendered hereby, the signature must
correspond with the name(s) as written on the face of the Old Note without
alteration, enlargement or any change whatsoever.

     If any of the Old Notes tendered hereby are owned of record by two or more
joint owners, all such owners must sign this Letter of Transmittal.

     If a number of Old Notes registered in different names are tendered, it
will be necessary to complete, sign and submit as many copies of this Letter of
Transmittal as there are different registrations of Old Notes.

     If this Letter of Transmittal (or facsimile hereof) is signed by the
registered Holder or Holders (which term, for the Purposes described herein,
shall include a book-entry transfer facility whose name appears on a security
listing as the owner of the Old Notes) of Old Notes tendered and the certificate
or certificates for Exchange Notes issued in exchange therefor is to be issued
(or any untendered principal amount of Old Notes to be reissued) to the
registered Holder, then such Holder need not and should not endorse any tendered
Old Notes, nor provide a separate bond power. In any other case, such Holder
must either properly endorse the Old Notes tendered or transmit a properly
completed separate bond power with this Letter of Transmittal with the
signatures on the endorsement or bond power guaranteed by an Eligible
Institution.

     If this Letter of Transmittal (or facsimile hereof) is signed by a person
other than the registered Holder or Holders of any Old Notes listed, such Old
Notes must be endorsed or accompanied by appropriate bond powers in each case
signed as the name of the registered Holder or Holders appears on the Old Notes.

     If this Letter of Transmittal (or facsimile hereof) or any Old Notes or
bond powers are signed by trustees, executors, administrators, guardians,
attorneys-in-fact, or officers of corporations or others acting in a fiduciary
or representative capacity, such persons should so indicate when signing, and
unless waived by the Company, evidence satisfactory to the Company of their
authority so to act must be submitted with this Letter of Transmittal.

     Endorsements on Old Notes or signatures on bond powers required by this
Instruction 6 must be guaranteed by an Eligible Institution.

     7.  SPECIAL REGISTRATION AND DELIVERY INSTRUCTIONS.  Tendering Holders
should indicate, in the applicable box or boxes, the name and address to which
Exchange Notes or substitute Old Notes for principal amounts not tendered or not
accepted for exchange are to be issued or sent, if different from the name and
address of the person signing this Letter of Transmittal. In the case of
issuance in a different name, the taxpayer identification or social security
number of the person named must also be indicated.

                                     - 10 -

     8.  BACKUP FEDERAL INCOME TAX WITHHOLDING AND SUBSTITUTE FORM W-9.  Under
the federal income tax laws, payments that may be made by the Company on account
of Exchange Notes issued pursuant to the Exchange Offer may be subject to backup
withholding at the rate of 31%. In order to avoid such backup withholding, each
tendering holder should complete and sign the Substitute Form W-9 included in
this Letter of Transmittal and either (a) provide the correct taxpayer
identification number ("TIN") and certify, under penalties of perjury, that
the TIN provided is correct and that (i) the holder has not been notified by the
Internal Revenue Service (the "IRS") that the holder is subject to backup
withholding as a result of failure to report all interest or dividends or (ii)
the IRS has notified the holder that the holder is no longer subject to backup
withholding; or (b) provide an adequate basis for exemption. If the tendering
holder has not been issued a TIN and has applied for one, or intends to apply
for one in the near future, such holder should write "Applied For" in the
space provided for the TIN in Part I of the Substitute Form W-9, sign and date
the Substitute Form W-9 and sign the Certificate of Payee Awaiting Taxpayer
Identification Number. If "Applied For" is written in Part I, the Company (or
the Paying Agent under the indenture governing the Exchange Notes) shall retain
31% of payments made to the tendering holder during the sixty-day period
following the date of the Substitute Form W-9. If the Holder furnishes the
Exchange Agent or the Company with its TIN within sixty days after the date of
the Substitute Form W-9, the Company (or the Paying Agent) shall remit such
amounts retained during the sixty-day period to the Holder and no further
amounts shall be retained or withheld from payments made to the Holder
thereafter. If, however, the Holder has not provided the Exchange Agent or the
Company with its TIN within such sixty-day period, the Company (or the Paying
Agent) shall remit such previously retained amounts to the IRS as backup
withholding. In general, if a Holder is an individual, the TIN is the Social
Security number of such individual. If the Exchange Agent or the Company are not
provided with the correct TIN, the Holder may be subject to a $50 penalty
imposed by the IRS. Certain Holders (including, among others, certain
corporations and certain foreign individuals) are not subject to these backup
withholding and reporting requirements. In order for a foreign individual to
qualify as an exempt recipient, such Holder must submit a statement (generally,
IRS Form W-8), signed under penalties of perjury, attesting to that individual's
exempt status. Such statements can be obtained from the Exchange Agent. For
further information concerning backup withholding and instructions for
completing the Substitute Form W-9 (including how to obtain a taxpayer
identification number if you do not have one and how to complete the Substitute
Form W-9 if Old Notes are registered in more than one name), consult the
enclosed Guidelines for Certification of Taxpayer Identification Number on
Substitute Form W-9.

     Failure to complete the Substitute Form W-9 will not, by itself, cause Old
Notes to be deemed invalidly tendered, but may require the Company (or the
Paying Agent) to withhold 31% of the amount of any payments made on account of
the Exchange Notes. Backup withholding is not an additional federal income tax.
Rather, the federal income tax liability of a person subject to backup
withholding will be reduced by the amount of tax withheld. If backup withholding
results in an overpayment of taxes, a refund may be obtained from the IRS.

     9.  TRANSFER TAXES.  The Company will pay all transfer taxes, if any,
applicable to the exchange of Old Notes pursuant to the Exchange Offer. If,
however, certificates representing Exchange Notes or Old Notes for principal
amounts not tendered or accepted for exchange are to be delivered to, or are to
be registered in the name of, any person other than the registered holder of the
Old Notes tendered hereby, or if tendered Old Notes are registered in the name
of a person other than the person signing this Letter of Transmittal, or if a
transfer tax is imposed for any reason other than the exchange of Old Notes
pursuant to the Exchange Offer, then the amount of any such transfer taxes
(whether imposed on the registered holder or on any other persons) will be
payable by the tendering Holder. If satisfactory evidence of payment of such
taxes or exemption therefrom is not submitted with this Letter of Transmittal,
the amount of such transfer taxes will be billed directly to such tendering
Holder. See the Prospectus under "The Exchange Offer -- Solicitation of
Tenders; Fees and Expenses."

     Except as provided in this Instruction 9, it will not be necessary for
transfer tax stamps to be affixed to the Old Notes listed in this Letter of
Transmittal.

     10.  WAIVER OF CONDITIONS.  The Company reserves the right, in their sole
discretion, to amend, waive or modify specified conditions in the Exchange Offer
in the case of any Old Notes tendered.

     11.  MUTILATED, LOST, STOLEN OR DESTROYED OLD NOTES.  Any tendering Holder
whose Old Notes have been mutilated, lost, stolen or destroyed should contact
the Exchange Agent at the address indicated herein for further instructions.

     12.  REQUESTS FOR ASSISTANCE OR ADDITIONAL COPIES.  Requests for assistance
and requests for additional copies of the Prospectus or this Letter of
Transmittal may be directed to the Exchange Agent at the address specified in
the Prospectus. Holder may also contact their broker, dealer, commercial bank,
trust company or other nominee for assistance concerning the Exchange Offer.

                                     - 11 -

                         (DO NOT WRITE IN SPACE BELOW)

 CERTIFICATE SURRENDERED    OLD NOTES TENDERED       OLD NOTES ACCEPTED
 _______________________    ____________________     _____________________

 _______________________    ____________________     _____________________
 Date Received__________    Accepted by_________     Checked by___________
 Delivery Prepared by___    Checked by__________     Date__________________


                           IMPORTANT TAX INFORMATION

     Under federal income tax laws, a Holder whose tendered Old Notes are
accepted for payment is required to provide the Exchange Agent (as payer) with
such Holder's correct TIN on Substitute Form W-9 below or otherwise establish a
basis for exemption from backup withholding. If such Holder is an individual,
the TIN is his social security number. If the Exchange Agent is not provided
with the correct TIN, a $50 penalty may be imposed by the IRS, and payments made
pursuant to the Exchange Offer may be subject to backup withholding.

     Certain Holders (including, among others, certain corporations and certain
foreign persons) are not subject to these backup withholding and reporting
requirements. Exempt Holders should indicate their exempt status on Substitute
Form W-9. A foreign person may qualify as an exempt recipient by submitting to
the Exchange Agent a properly completed IRS Form W-8, signed under penalties of
perjury, attesting to that Holder's exempt status. A Form W-8 can be obtained
from the Exchange Agent. See the enclosed "Guidelines for Certification of
Taxpayer Identification Number on Substitute Form W-9" for additional
instructions.

     If backup withholding applies, the Exchange Agent is required to withhold
31% of any payments made to the Holder or other payee. Backup withholding is not
an additional federal income tax. Rather, the federal income tax liability of
persons subject to backup withholding will be reduced by the amount of tax
withheld. If withholding results in an overpayment of taxes, a refund may be
obtained from the IRS.

PURPOSE OF SUBSTITUTE FORM W-9

     To prevent backup withholding on payments made with respect to the Exchange
Offer, the Holder is required to provide the Exchange Agent with either: (i) the
Holder's correct TIN by completing the Substitute Form W-9 below, certifying
that the TIN provided on Substitute Form W-9 is correct (or that such Holder is
awaiting a TIN) and that (A) the Holder has not been notified by the IRS that
the Holder is subject to backup withholding as a result of failure to report all
interest or dividends or (B) the IRS has notified the Holder that the Holder is
no longer subject to backup withholding or (ii) an adequate basis for exemption.

WHAT NUMBER TO GIVE THE EXCHANGE AGENT

     The Holder is required to give the Exchange Agent the TIN (E.G., social
security number or employer identification number) of the registered Holder of
the Old Notes. If the Old Notes are held in more than one name or are held not
in the name of the actual owner, consult the enclosed "Guidelines for
Certification of Taxpayer Identification Number on Substitute Form W-9" for
additional guidance on which number to report.

                                     - 12 -

        CERTIFICATION OF PAYEE AWAITING TAXPAYER INDEMNIFICATION NUMBER

      I certify, under penalties of perjury, that a Taxpayer Identification
 Number has not been issued to me, and that I mailed or delivered an
 application to receive a Taxpayer Identification Number to the appropriate
 Internal Revenue Service Center or Social Security Administration Office (or I
 intend to mail or deliver an application in the near future). I understand
 that if I do not provide a Taxpayer Identification Number to the payer, 31% of
 all payments made to me on account of the Exchange Notes shall be retained
 until I provide a Taxpayer Identification Number to the payer and that, if I
 do not provide my Taxpayer Identification Number within sixty days, such
 retained amounts shall be remitted to the Internal Revenue Service as backup
 withholding and 31% of all reportable payments made to me thereafter will be
 withheld and remitted to the Internal Revenue Service until I provide a
 Taxpayer Identification Number.

 SIGNATURE  ___________________________      DATE  ___________________________

 NOTE:  FAILURE TO COMPLETE AND RETURN THIS FORM MAY RESULT IN BACKUP
        WITHHOLDING OF 31% OF ANY PAYMENTS MADE TO YOU ON ACCOUNT OF THE
        EXCHANGE NOTES. PLEASE REVIEW THE ENCLOSED GUIDELINES FOR CERTIFICATION
        OF TAXPAYER IDENTIFICATION NUMBER ON SUBSTITUTE FORM W-9 FOR ADDITIONAL
        DETAILS.

                                                      Department of the Treasury
                                                        INTERNAL REVENUE SERVICE

                    TO BE COMPLETED BY ALL TENDERING HOLDERS
                              (SEE INSTRUCTION 8)

                                                                           
                                                PAYOR'S NAME:  PENTACON, INC.

 SUBSTITUTE                        PART I -- TAXPAYER IDENTIFICATION NUMBER                 SOCIAL SECURITY NUMBER
 FORM W-9                          (TIN)                                                ______________________________  
 DEPARTMENT OF THE TREASURY        ENTER YOUR TIN IN THE APPROPRIATE BOX. FOR                         OR
 INTERNAL REVENUE SERVICE          INDIVIDUALS, THIS IS YOUR SOCIAL SECURITY            EMPLOYER IDENTIFICATION NUMBER
 REQUEST FOR TAXPAYER              NUMBER (SSN). FOR SOLE PROPRIETORS, SEE THE
 IDENTIFICATION NUMBER             INSTRUCTIONS IN THE ENCLOSED GUIDELINES. FOR         _______________________________
 AND CERTIFICATION                 OTHER ENTITIES, IT IS YOUR EMPLOYER
                                   IDENTIFICATION NUMBER (EIN). IF YOU DO NOT
                                   HAVE A NUMBER, SEE HOW TO GET A TIN IN THE
                                   ENCLOSED GUIDELINES.
                                   NOTE: IF THE ACCOUNT IS IN MORE THAN ONE
                                   NAME, SEE THE CHART ON PAGE 2 OF THE
                                   ENCLOSED GUIDELINES FOR INSTRUCTIONS ON
                                   WHOSE NUMBER TO ENTER.
                                   PART II -- FOR PAYEES EXEMPT FROM BACKUP WITHHOLDING
                                   (See Part II instructions in the enclosed Guidelines.)


PART III -- CERTIFICATION -- UNDER PENALTIES OF PERJURY, I CERTIFY THAT:
 (1) the number shown on this form is my correct Taxpayer Identification Number (or I am waiting for a number to be issued to
     me) and
 (2) I am not subject to backup withholding because (a) I am exempt from backup withholding or (b) I have not been notified
     by the Internal Revenue Service (IRS) that I am subject to backup withholding as a result of a failure to report all
     interest or dividends or (c) the IRS has notified me that I am no longer subject to backup withholding.

 Signature_________________________________________   Date_________________________________ , 1999


    CERTIFICATION INSTRUCTIONS -- You must cross out item (2) above if you have
been notified by the IRS that you are currently subject to backup withholding
because you have failed to report all interest or dividends on your tax return.
For real estate transactions, item 2 does not apply. For mortgage interest paid,
the acquisition or abandonment of secured property, cancellation of debt,
contributions to an individual retirement arrangement (IRA), and generally
payments other than interest and dividends, you are not required to sign the
Certification, but you must provide your correct TIN.

                                     - 13 -