CUSIP No.
Registered                                                           Face Amount
No. FX-


                         UNITED TECHNOLOGIES CORPORATION
                           MEDIUM-TERM NOTE, SERIES B
                              (SINGLE INDEXED NOTE)
             Due from Nine Months to Thirty Years from Date of Issue

               If the registered  owner of this Security (as indicated below) is
The Depository Trust Company (the  "Depository") or a nominee of the Depository,
this  Security is a Global  Security  and the  following  legend is  applicable:
Unless this  certificate  is presented by an  authorized  representative  of The
Depository Trust Company (55 Water Street,  New York, New York) to the issuer or
its agent for registration of transfer, exchange or payment, and any certificate
issued is  registered in the name of CEDE & CO., or such other name as requested
by an authorized representative of The Depository Trust Company, and any payment
is made to CEDE & CO.,  ANY  TRANSFER,  PLEDGE OR OTHER USE  HEREOF FOR VALUE OR
OTHERWISE BY OR TO ANY PERSON IS WRONGFUL,  since the  registered  owner hereof,
CEDE & CO., has an interest herein.

IF  APPLICABLE,  THE "TOTAL  AMOUNT OF OID,"  "YIELD TO  MATURITY"  AND "INITIAL
ACCRUAL  PERIOD  OID"  (COMPUTED  UNDER THE  APPROXIMATE  METHOD)  BELOW WILL BE
COMPLETED  SOLELY FOR THE PURPOSES OF APPLYING  THE FEDERAL  INCOME TAX ORIGINAL
ISSUE DISCOUNT ("OID") RULES.

ISSUE PRICE:

ORIGINAL ISSUE DATE:

STATED MATURITY DATE:

AUTHORIZED DENOMINATIONS:

INTEREST RATE:

TOTAL AMOUNT OF OID:

YIELD TO MATURITY:

INITIAL ACCRUAL PERIOD OID:







SINKING FUND:

SPECIFIED CURRENCY:

EXCHANGE RATE AGENT:

OPTION TO RECEIVE PAYMENTS IN SPECIFIED CURRENCY:   |_| YES   |_| NO

INTEREST PAYMENT DATES:

REGULAR RECORD DATES:

DENOMINATED CURRENCY:

INDEXED CURRENCY:

BASE EXCHANGE RATE:

DETERMINATION AGENT:

REFERENCE DEALERS:

OPTIONAL REDEMPTION:    |_| YES   |_| NO

INITIAL REDEMPTION DATE:

OPTION TO ELECT REPAYMENT:    |_| YES   |_| NO

OPTIONAL REPAYMENT DATES:

OPTIONAL REPAYMENT PRICES:

OPTIONAL INTEREST RATE RESET:    |_| YES   |_| NO

OPTIONAL RESET DATES:

OPTIONAL EXTENSIONS OF MATURITY:    |_| YES   |_| NO

LENGTH OF EXTENSION PERIOD:

NUMBER OF EXTENSION PERIODS:



                                        2





FINAL MATURITY DATE:

DEPOSITORY:

DEFEASANCE:    |_| YES   |_| NO

COVENANT DEFEASANCE:    |_| YES   |_| NO

OTHER PROVISIONS:

               IF  APPLICABLE AS DESCRIBED  ABOVE,  THE  REDEMPTION  PRICE SHALL
INITIALLY ____% OF THE PRINCIPAL  AMOUNT OF THIS SECURITY  PAYABLE AT THE STATED
MATURITY  DATE  AND  SHALL  DECLINE  AT EACH  ANNIVERSARY  (EACH  SUCH  DATE,  A
"REDEMPTION  DATE") OF THE INITIAL  REDEMPTION  DATE BY ____% OF SUCH  PRINCIPAL
AMOUNT UNTIL THE REDEMPTION  PRICE IS 100% OF SUCH PRINCIPAL  AMOUNT;  PROVIDED,
HOWEVER,  THAT, IF THIS SECURITY IS A DISCOUNT  SECURITY,  THE REDEMPTION  PRICE
SHALL BE THE  AMORTIZED  FACE  AMOUNT AS  DESCRIBED  ON THE  REVERSE  HEREOF.  A
DISCOUNT  SECURITY IS ANY SECURITY  FOR WHICH THE TOTAL AMOUNT OF OID  SPECIFIED
ABOVE IS GREATER THAN ZERO.

               UNITED TECHNOLOGIES  CORPORATION,  a Delaware corporation (herein
called the "Company,"  which term includes any successor  corporation  under the
Indenture  hereinafter referred to), for value received,  hereby promises to pay
to  __________________ or registered assigns, in the Denominated Currency on the
Stated Maturity Date the principal sum equal to the Face Amount hereof,  plus or
minus an amount  determined by the  Determination  Agent in accordance  with the
formula  set forth below and to pay  interest  on the Face  Amount as  described
below and on the reverse hereof.

               If the Spot Rate exceeds or equals the Base  Exchange  Rate,  the
principal  amount of this Security  payable at the Stated  Maturity Date (which,
unless otherwise specified on the face hereof, shall in no event be greater than
twice the Face Amount of this Security) shall equal:

Face Amount + (Face Amount x   Spot Rate - Base Exchange Rate  )
                             ----------------------------------
                                        Spot Rate

               If the Base  Exchange  Rate exceeds the Spot Rate,  the principal
amount of the Security payable,  at the Stated Maturity Date (which shall, in no
event, be less than zero) shall equal:




                                        3





Face Amount - (Face Amount x   Base Exchange Rate - Spot Rate  )
                             ----------------------------------
                                       Spot Rate

               where (i) "Base Exchange Rate" is the exchange rate, expressed in
units  of the  Indexed  Currency  per  one  unit  of the  Denominated  Currency,
specified as such above and (ii) "Spot Rate" is the rate,  expressed in units of
the Indexed  Currency per one unit of the Denominated  Currency,  which shall be
the  arithmetic  mean of the open market spot offer  quotations  for the Indexed
Currency  (spot bid  quotations for the  Denominated  Currency)  obtained by the
Determination  Agent from the Reference  Dealers  specified above in The City of
New York at 11:00  a.m.,  New York City time,  on the second  Exchange  Rate Day
prior to the Stated Maturity Date (the  "Determination  Date"), for an amount of
Indexed Currency equal to the Face Amount hereof multiplied by the Base Exchange
Rate, in terms of the Denominated Currency for settlement on the Stated Maturity
Date. If such  quotations  from the  Reference  Dealers are not available on the
Determination Date due to circumstances beyond the control of the Company or the
Determination  Agent,  the Spot Rate will be determined on the basis of the most
recently available  quotations from the Reference  Dealers.  If the Spot Rate is
less than or equal to one-half of the Base Exchange  Rate, the Spot Rate will be
deemed to be one-half of the Base Exchange Rate and no principal amount shall be
payable hereon at the Stated Maturity Date.

               "Exchange  Rate Day" means any day which is a Business Day in The
City of New York and, if the  Denominated  Currency  or Indexed  Currency is any
currency or currency unit other than U.S.  dollars,  in the principal  financial
center of the country of such Denominated Currency or Indexed Currency.

               "Reference  Dealers" means the three banks or firms  specified as
such on the face  hereof  or,  if any of them  shall be  unwilling  or unable to
provide the requested quotations, such other major money center bank or banks in
The  City  of New  York  selected  by the  Company,  in  consultation  with  the
Determination  Agent,  to act as  Reference  Dealer or  Dealers  in  replacement
therefor.

               In the  event of any  optional  redemption  by the  Company,  any
repayment  at the option of the Holder or  acceleration  of the Maturity of this
Security  prior to the Stated  Maturity  Date,  the term "Stated  Maturity Date"
shall  refer  to the  date of  redemption,  repayment  or  acceleration  of this
Security.

               The Company  shall pay interest on the Face Amount  hereof at the
Interest  Rate shown above from the Original  Issue Date shown above or from the
most  recent  Interest  Payment  Date to which  interest  has been  paid or duly
provided  for,  semi-annually  on June 15 and  December 15 of each year (each an
"Interest  Payment Date") (unless other Interest  Payment Dates are specified on
the face  hereof)  until  the  principal  hereof is paid or made  available  for
payment and at Maturity;  provided,  however, that any payment of principal (and
premium,  if any) or interest to be made on any  Interest  Payment  Date or on a
date of Maturity


                                        4





that is not a Business  Day shall be made on the next  succeeding  Business  Day
with the same force and  effect as if made on the  Interest  Payment  Date or at
Maturity,  as the case may be,  and no  additional  interest  shall  accrue as a
result of such delayed  payment.  For purposes of this Security,  "Business Day"
means any day, other than a Saturday or Sunday, that meets each of the following
applicable requirements:  the day is (a) not a day on which banking institutions
are  authorized or required by law or regulation to be closed in The City of New
York and (b) if the Specified Currency shown above is not U.S. dollars,  (i) not
a day on  which  banking  institutions  are  authorized  or  required  by law or
regulation to close in the financial center of the country issuing the Specified
Currency  (which,  in the case of European  Currency  Units,  shall be Brussels,
Belgium) and (ii) a day on which banking  institutions in such financial  center
are carrying out transactions in such Specified Currency.

               The interest so payable,  and  punctually  paid or duly  provided
for, on any Interest  Payment Date will, as provided in such Indenture,  be paid
to  the  Person  in  whose  name  this  Security  (or  one or  more  Predecessor
Securities)  is registered  at the close of business on the Regular  Record Date
for such  interest,  which  shall be the May 31 or  November  30  (unless  other
Regular  Record  Dates are  specified  on the face  hereof )  (whether  or not a
Business Day), as the case may be, next  preceding  such Interest  Payment Date;
provided,  however,  that,  in the case of a Security  origin  issued  between a
Regular  Record  Date and the initial  Interest  Payment  Date  relating to such
Security,  interest  for the period  beginning  on the  Original  Issue Date and
ending on such  initial  Interest  Payment  Date  shall be paid on such  initial
Interest  Payment  Date to the  Person to whom  such  Security  shall  have been
originally  issued;  provided  further  that in the  case of a  Global  Security
originally issued between a Regular Record Date and the initial Interest Payment
Date  relating  to such  Security,  interest  for the  period  beginning  on the
Original  Issue Date and ending on such initial  Interest  Payment Date shall be
paid on the Interest  Payment Date following the next succeeding  Regular Record
Date to the registered  Holder on such next succeeding  Regular Record Date. Any
such interest not so punctually  paid or duly provided for will forthwith  cease
to be payable to the Holder on such  Regular  Record Date and may either be paid
to  the  Person  in  whose  name  this  Security  (or  one or  more  Predecessor
Securities)  is registered at the close of business on a Special Record Date for
the  payment  of such  Defaulted  Interest  to be fixed by the  Trustee,  notice
whereof shall be given to Holders of Securities of this series not less than ten
days  prior to such  Special  Record  Date,  or be paid at any time in any other
lawful manner, all as more fully provided in said Indenture.

               All  payments  in respect of this  Security  will be made in U.S.
dollars  regardless  of the  Specified  Currency  shown above  unless the Holder
hereof makes the election described below. If the Specified Currency shown above
is other than U.S. dollars, the Company or its agent will arrange to convert all
payments in respect  hereof  into U.S.  dollars in the manner  described  on the
reverse hereof;  provided,  however, that the Holder hereof may, if so indicated
above, elect to receive all payments in such Specified Currency by delivery of a
written request to the Company's  co-paying agent (the "Co-Paying Agent") in The
City of New York,  which must be received by the Co-Paying  Agent on or prior to
the applicable record date or at least


                                        5





fifteen  calendar days prior to Maturity,  as the case may be; provided  further
that if the Holder of this  Security  elects to receive  all such  payments in a
Specified  Currency that is replaced by a single European currency  (expected to
be named the euro),  the amount of  principal  of  premium,  if any, or interest
payable on any Security  denominated in such currency shall be determined in the
new single  European  currency in conformity  with legally  applicable  measures
taken  pursuant  to, or by virtue  of,  the  treaty  establishing  the  European
Community, as amended by the treaty on European Union. Such election will remain
in effect unless and until changed by written notice to the Co-Paying Agent, but
the Co-Paying  Agent must receive  written notice of any such change on or prior
to the  applicable  record  date or at  least  fifteen  calendar  days  prior to
Maturity,  as the case may be. Until the Securities are paid or payment therefor
is provided for, the Company will at all times maintain a Co-Paying Agent in The
City of New York  capable  of  performing  the  duties  described  herein  to be
performed by the Co- Paying Agent.  The Company has appointed  State Street Bank
and Trust Company, N.A., New York, New York, as Co-Paying Agent.

               In the  event  of an  official  redenomination  of the  Specified
Currency shown above, the obligations of the Company with respect to payments on
this  Security  shall,  in all  cases,  be  deemed  immediately  following  such
redenomination  to provide for payment of that amount of redenominated  currency
representing   the  amount  of  such   obligations   immediately   before   such
redenomination.  In no event shall any  adjustment be made to any amount payable
hereunder as a result of any change in the value of the Specified Currency shown
above  relative to any other  currency  due solely to  fluctuations  in exchange
rates.

               Unless  otherwise  shown  above,  payment  of  interest  on  this
Security  (other than at  Maturity)  will be made by check (from an account at a
bank outside the United States if such check is payable in a currency other than
U.S.  dollars) mailed to the registered  address of the Person entitled thereto;
provided that, if the Holder hereof is the Holder of  U.S.$10,000,000 or more in
aggregate  principal  amount  of  Securities  of like  tenor  and  term  (or the
equivalent thereof in a Specified Currency other than U.S. dollars determined as
provided  on the  reverse  hereof),  such  interest  payments  will  be  made in
immediately  available  funds,  but only if appropriate  instructions  have been
received in writing by the Co-Paying Agent on or prior to the applicable  record
date.  Simultaneously with any election by the Holder hereof to receive payments
in respect hereof in the Specified Currency (if other than U.S.  dollars),  such
Holder may, if applicable,  provide  appropriate  instructions to the Co- Paying
Agent,  and all such payments will be made in immediately  available funds to an
account  maintained by the payee with a bank located  outside the United States.
Unless otherwise specified above, the principal hereof (and premium, if any) and
interest  hereon  payable at Maturity  will be paid to the Holder on the date of
Maturity in immediately available funds (payable to an account maintained by the
payee with a bank  located  outside the United  States if payable in a Specified
Currency other than U.S.  dollars) upon surrender of this Security at the office
of the Co-Paying Agent for that purpose in The City and State of New York (or at
such other location as may be specified  above),  provided that this Security is
presented to the Co-Paying  Agent in time for the  Co-Paying  Agent to make such
payments in


                                        6





such funds in accordance with its nominal  procedures.  The Company will pay any
administrative  costs  imposed by banks in  connection  with making  payments in
immediately  available  funds,  but any tax,  assessment or governmental  charge
imposed upon payments will be borne by the Holders of the  Securities in respect
of which such payments are made.

               Interest on this Security,  if any, will be computed on the basis
of a 360-day year of twelve 30-day months.

               If the registered  owner of this Security (as indicated above) is
the  Depository  or a  nominee  of the  Depository,  this  Security  is a Global
Security  and the  following  legend is  applicable  except as  specified on the
reverse hereof: THIS GLOBAL SECURITY MAY NOT BE TRANSFERRED EXCEPT AS A WHOLE BY
THE  DEPOSITORY OR BY A NOMINEE OF THE  DEPOSITORY TO THE  DEPOSITORY OR ANOTHER
NOMINEE  OF  THE  DEPOSITORY  OR BY THE  DEPOSITORY  OR ANY  SUCH  NOMINEE  TO A
SUCCESSOR OF THE DEPOSITORY OR A NOMINEE OF SUCH SUCCESSOR.

               REFERENCE  IS  HEREBY  MADE  TO THE  FURTHER  PROVISIONS  OF THIS
SECURITY SET FORTH ON THE REVERSE HEREOF, WHICH FURTHER PROVISIONS SHALL FOR ALL
PURPOSES HAVE THE SAME EFFECT AS IF SET FORTH AT THIS PLACE.

               Unless the certificate of authentication hereon has been executed
by the  Trustee  referred  to on the reverse  hereof by manual  signature,  this
Security shall not be entitled to any benefit under the Indenture or be valid or
obligatory for any purpose.

                IN WITNESS WHEREOF, the Company has caused this instrument to be
duly executed under its corporate seal.

Dated:
      ---------------------------------

UNITED TECHNOLOGIES CORPORATION


By:
   ------------------------------------
         Vice President, Treasurer



Attest:
       --------------------------------
                  Secretary





                                        7





                         TRUSTEE'S CERTIFICATE OF AUTHENTICATION


               This is one of the  Securities of the series  designated  therein
referred to in the within-mentioned Indenture.

STATE STREET BANK AND TRUST COMPANY
As Trustee


By:
   ------------------------------------
           Authorized Officer











                                        8





                              [Reverse of Security]

                         UNITED TECHNOLOGIES CORPORATION
                           MEDIUM-TERM NOTE, SERIES B

               Section 1.  General.  This  Security is one of a duly  authorized
issue of securities of the Company (herein called the "Securities"),  issued and
to be  issued in one or more  series  under an  Indenture,  dated as of April 1,
1990,  as  it  may  be  supplemented  from  time  to  time  (herein  called  the
"Indenture"),  between the Company and State  Street Bank and Trust  Company (as
successor to The  Connecticut  National  Bank),  as Trustee  (herein  called the
"Trustee",  which term includes any successor  trustee under the Indenture  with
respect to the series of which this Security is a part),  to which Indenture and
all indentures  supplemental thereto reference is hereby made for a statement of
the respective rights,  limitations of rights,  duties and immunities thereunder
of the Company,  the Trustee and the Holders of the  Securities and of the terms
upon which the Securities are, and are to be, authenticated and delivered.  This
Security  is one of the  series  designated  on the face  hereof,  unlimited  in
aggregate principal amount.

               Section 2. Payments. If the Specified Currency is other than U.S.
dollars, the amount of any U.S. dollar payment to be made in respect hereof will
be  determined  by the  Exchange  Rate Agent  specified  on the face hereof or a
successor thereto (the "Exchange Rate Agent") based on the indicative  quotation
in The City of New York selected by such  Exchange  Rate Agent at  approximately
11:00  a.m.,  New York City  time,  on the second  Business  Day  preceding  the
applicable  payment  date that yields the largest  number of U.S.  dollars  upon
conversion of the Specified  Currency.  Such selection  shall be made from among
the quotations from three recognized foreign exchange dealers in The City of New
York  selected by the  Exchange  Rate Agent and  approved by the Company (one of
which may be the Exchange  Rate Agent) for the  purchase by the quoting  dealer,
for settlement on such payment date, of the Specified Currency for U.S. dollars.
If no such bid quotations are available,  payments will be made in the Specified
Currency unless such Specified Currency is unavailable as provided below.

               If the  Specified  Currency  is other than U.S.  dollars  and the
Specified  Currency is unavailable due to the imposition of exchange controls or
to other  circumstances  beyond  the  Company's  control,  the  Company  will be
entitled to make payments in U.S.  dollars on the, basis of the noon buying rate
in The  City of New  York for  cable  transfers  in the  Specified  Currency  as
certified  for customs  purposes by the  Federal  Reserve  Bank of New York (the
"Market  Exchange Rate") for such Specified  Currency on the second Business Day
prior to the applicable  payment date. In the event such Market Exchange Rate is
not then  available,  the  Company  will be  entitled  to make  payments in U.S.
dollars (i) if such Specified Currency is not a composite currency, on the basis
of the most recently  available Market Exchange Rate for such Specified Currency
or (ii)  if such  Specified  Currency  is a  composite  currency,  in an  amount
determined by the Exchange Rate Agent to be the sum of the results obtained by


                                        9





multiplying  the number of units of each  component  currency of such  composite
currency,  as of the most recent date on which such composite currency was used,
by the Market  Exchange Rate for such component  currency on the second Business
Day prior to such  payment  date (or if such  Market  Exchange  Rate is not then
available,  by the  most  recently  available  Market  Exchange  Rate  for  such
component currency).  From the start of the third stage of European Economic and
Monetary  Union,  any payments on this  Security that are required to be made in
ECU  will be  payable  in euro at the  rate of one  euro  for one  ECU,  and the
provisions  discussed  in this  paragraph  will not  result in  payment  in U.S.
dollars in such  circumstances  unless  euros are no longer used in the European
Monetary System.

               All currency  exchange  costs will be borne by the Company unless
the Holder of this  Security  has made an election to receive all  payments in a
Specified  Currency  other than U.S.  dollars.  In that case, the Holder of this
Security  shall bear its pro rata portion of currency  exchange  costs,  if any,
with all other electing Holders by deductions from payments otherwise due.

               Each payment of interest  hereon shall include  interest  accrued
through the day before the Interest  Payment  Date or Maturity,  as the case may
be.

               References herein to "U.S.  dollars" or "U.S.$" or "$" are to the
currency of the United States of America.

               Section 3.  Redemption.  If so specified on the face hereof,  the
Company may at its option  redeem this Security in whole or from time to time in
part on or after the date designated as the Initial  Redemption Date on the face
hereof at prices  declining  from a specified  premium,  if any, to par together
with accrued  interest to the  Redemption  Date.  The Company may exercise  such
option by causing the Trustee to mail, first class postage prepaid,  a notice of
such  redemption  at least 30 but not more than 60 days prior to the  Redemption
Date,  setting forth the  applicable  redemption  price,  Redemption  Date,  and
principal amount of this Security to be redeemed.  In the event of redemption of
this  Security in part only, a new  Security or  Securities  for the  unredeemed
portion  hereof  shall be  issued  in the  name of the  Holder  hereof  upon the
cancellation  hereof.  If less than all of the  Securities  with like  tenor and
terms to this Security are to be redeemed,  the  Securities to be redeemed shall
be selected  by the  Trustee by such  method as the Trustee  shall deem fair and
appropriate.

               Section  4.  Optional  Repayment.  If so  specified  on the  face
hereof, this Security will be repayable prior to the Stated Maturity Date at the
option of the Holder on the Optional Repayment Dates shown on the face hereof at
the Optional  Repayment  Prices shown on the face hereof  together  with accrued
interest to the applicable  Optional  Repayment Date. In order for this Security
to be repaid,  the  Company  must  receive at least 30 but not more than 45 days
prior to an Optional  Repayment  Date this Security with the form below entitled
"Option to Elect  Repayment"  duly  completed.  Any tender of this  Security for
repayment shall be irrevocable, except as otherwise provided in Sections 5 and 6
hereof. The repayment option


                                       10





may be  exercised  by the Holder of this  Security for less than the entire Face
Amount of the Security  provided that the Face Amount of the Security  remaining
outstanding  after  repayment is an authorized  denomination.  Upon such partial
repayment, this Security shall be cancelled and a new Security or Securities for
the remaining  principal amount hereof shall be issued in the name of the Holder
of this Security.

               Section 5. Optional  Interest  Reset. If so specified on the face
hereof,  the interest  rate on this  Security may be reset by the Company on the
date or dates specified on the face hereof (each an "Optional Reset Date").  The
Company may exercise  such option with respect to this Security by notifying the
Trustee  of such  exercise  at least 50 but not  more  than 60 days  prior to an
Optional  Reset  Date for this  Security.  Not later  than 40 days prior to each
Optional  Reset  Date,  the Trustee  will mail to the Holder of this  Security a
notice (the "Reset Notice"),  first class postage prepaid, setting forth (i) the
election of the Company to reset the interest rate,  (ii) such new interest rate
and (iii) the  provisions,  if any, for  redemption  during the period from such
Optional  Reset Date to the next Optional Reset Date or if there is no such next
Optional  Reset Date, to the Stated  Maturity  Date of this Security  (each such
period a "Subsequent Interest Period"),  including the date or dates on which or
the  period or  periods  during  which  and the  price or  prices at which  such
redemption may occur during the Subsequent Interest Period.

               Notwithstanding  the  foregoing,  not later than 20 days prior to
the Optional  Reset Date,  the Company  may, at its option,  revoke the interest
rate provided for in the Reset Notice and  establish a higher  interest rate for
the Subsequent Interest Period commencing on such Optional Reset Date by causing
the Trustee to mail Notice of such  higher  interest  rate to the Holder of this
Security. Such notice shall be irrevocable. All Securities with respect to which
the  interest  rate is reset on an  Optional  Reset  Date will bear such  higher
interest rate, whether or not tendered for repayment as described below.

               If the Company  elects to reset the interest  rate, the Holder of
this  Security  will have the option to elect  repayment  by the Company of this
Security on any  Optional  Reset Date at a price equal to the  principal  amount
hereof plus any accrued interest to such Optional Reset Date. In order to obtain
repayment on an Optional  Reset Date,  the Holder must follow the procedures set
forth above for optional  repayment  except that the period for delivery of this
Security or  notification  to the Trustee shall be at least 25 but not more than
35 days prior to such  Optional  Reset  Date and  except  that if the Holder has
tendered this Security for  repayment  pursuant to the Reset Notice,  the Holder
may, by written  notice to the  Trustee,  revoke any such  tender for  repayment
until the close of business on the tenth day prior to such Optional Reset Date.

               Section 6. Optional Extension of Maturity. If so specified on the
face hereof,  the Stated  Maturity  Date of this Security may be extended at the
option of the  Company  for the period or periods  specified  on the face hereof
(each an "Extension  Period") up to but not beyond the date (the "Final Maturity
Date") set forth on the face hereof. The Company may


                                       11





exercise  such option with respect to this  Security by notifying the Trustee of
such exercise at least 50 but not more than 60 days prior to the Stated Maturity
Date of this  Security  in effect  prior to the  exercise  of such  option  (the
"Original  Stated Maturity  Date").  If the Company  exercises such option,  the
Trustee will mail to the Holder of this Security not later than 40 days prior to
the Original  Stated  Maturity  Date a notice (the  "Extension  Notice"),  first
class, postage prepaid, indicating (i) the election of the Company to extend the
Stated Maturity Date, (ii) the new Stated Maturity Date, (iii) the interest rate
applicable  to the  Extension  Period  and  (iv)  the  provisions,  if any,  for
redemption during such Extension Period, including the date or dates on which or
the  period or  periods  during  which  and the  price or  prices at which  such
redemption may occur during the Extension Period.  Upon the Trustee's mailing of
the  Extension  Notice,  the  Stated  Maturity  Date of this  Security  shall be
extended  automatically  and, except as modified by the Extension  Notice and as
described in the next paragraph, this Security will have the same terms as prior
to the mailing of such Notice.

               Notwithstanding  the  foregoing,  not later than 20 days prior to
the  Original  Stated  Maturity  Date of this  Security  the Company may, at its
option,  revoke the  interest  rate  provided  for in the  Extension  Notice and
establish a higher interest rate for the Extension Period by causing the Trustee
to mail notice of such higher interest rate, first class,  postage  prepaid,  to
the Holder of this Security.  Such notice shall be  irrevocable.  All Securities
with respect to which the Stated Maturity Date is extended will bear such higher
interest rate for the Extension Period, whether or not tendered for repayment as
described below.

               If the Company elects to extend the Stated  Maturity Date of this
Security, the Holder will have the option to elect repayment of this Security by
the  Company  on the  Original  Stated  Maturity  Date at a price  equal  to the
principal  amount  hereof,  plus any accrued  interest to such date. In order to
obtain  repayment  on the  Original  Stated  Maturity  Date once the Company has
extended the Stated Maturity Date hereof,  the Holder must follow the procedures
set forth above for optional  repayment,  except that the period for delivery of
this Security or  notification  to the Trustee shall be at least 25 but not more
than 35 days prior to the Original  Stated Maturity Date and except that, if the
Holder has tendered this Security for repayment pursuant to an Extension Notice,
the Holder may,  by written  notice to the  Trustee,  revoke any such tender for
repayment  until the close of  business  on the tenth day prior to the  Original
Stated Maturity Date.

               Section 7. Sinking Fund.  Unless otherwise  specified on the face
hereof, this Security will not be subject to any sinking fund.

               Section 8.  Discount  Securities.  If this Security is a Discount
Security,  the  amount  payable  in the  event  of  redemption  by the  Company,
repayment at the option of the Holder or  acceleration  of Maturity,  in lieu of
the Face Amount due at the Stated Maturity hereof,  shall be equal to the sum of
(i) unpaid interest,  if any, on this Security accrued from the date of issue to
the date of such redemption,  repayment or acceleration of maturity, as the case
may be, and (ii) the  Amortized  Face Amount of this  Security as of the date of
such


                                       12





redemption,  repayment  or  acceleration.  The  "Amortized  Face Amount" of this
Security  shall be the amount  equal to (a) the Issue Price (as set forth on the
face hereof) plus (b) that portion of the difference between the Issue Price and
the Face Amount  hereof that has accrued at the Yield to Maturity  (as set forth
on the face hereof)  (computed in  accordance  with  generally  accepted  United
States bond yield computation  principles) at the date as of which the Amortized
Face Amount is  calculated,  but in no event shall the Amortized  Face Amount of
this Security exceed its Face Amount.

               Section 9.  Modification  and Waivers;  Obligation of the Company
Absolute.  The Indenture  permits,  with certain exceptions as therein provided,
the amendment  thereof and the modification of the rights and obligations of the
Company  and the rights of the  Holders of the  Securities  of each series to be
affected under the Indenture at any time by the Company and the Trustee with the
consent of the Holders of not less than a majority in aggregate principal amount
of all  Securities at the time  Outstanding  to be affected.  The Indenture also
contains  provisions  permitting  the  Holders  of not less than a  majority  in
aggregate principal amount of the Securities at the time Outstanding,  on behalf
of the Holders of all Outstanding Securities, to waive compliance by the Company
with certain provisions of the Indenture, and contains provisions permitting the
Holders of not less than a majority in aggregate  principal  amount,  in certain
instances  of the  Outstanding  Securities  of  individual  series  and in other
instances of all Securities at the time  Outstanding,  to waive on behalf of all
of the Holders of Securities of such individual  series or of the Holders of all
Securities at the time  Outstanding,  as the case may be,  certain past defaults
under the  Indenture and their  consequences.  Any such consent or waiver by the
Holder of this  Security  shall be  conclusive  and binding upon such Holder and
upon all future  Holders of this  Security and of any  Security  issued upon the
registration  of  transfer  hereof or in  exchange  herefor  or in lieu  hereof,
whether or not notation of such consent or waiver is made upon this Security.

               No  reference  herein to the  Indenture  and no provision of this
Security  or of the  Indenture  shall  alter or  impair  the  obligation  of the
Company,  which is  absolute  and  unconditional,  to pay or make  provision  as
provided in Article  Fourteen of the  Indenture for the payment of the amount of
principal  of (and  premium,  if any)  and  interest  on  this  Security  herein
provided, and at the times, place and rate, and in the coin or currency,  herein
prescribed.

               Section 10.  Defeasance  and Covenant  Defeasance.  The Indenture
contains provisions for defeasance at any time of (a) the entire indebtedness of
the Company on this  Security  and (b)  certain  restrictive  covenants  and the
related  defaults  and Events of Default,  upon  compliance  by the Company with
certain  conditions set forth therein,  which provisions apply to this Security,
unless otherwise specified on the face hereof.

               Section 11.  Authorized  Denominations.  The  Securities  of this
series are issuable  only in global or  certificated  registered  form,  without
coupons,   and,  unless  otherwise   specified  above  (and  other  than  Global
Securities), in denominations of $100,000 and any integral multiple of $1,000 in
excess thereof.  As provided in the Indenture and subject to certain limitations
therein  set  forth  and to the  limitations  described  below,  if  applicable,
Securities of this series are  exchangeable  for a like aggregate Face Amount of
Securities of this


                                       13





series and of like tenor of a different authorized denomination, as requested by
the Holder surrendering the same.

               Section  12.  Registration  of  Transfer.   As  provided  in  the
Indenture and subject to certain  limitations therein set forth, the transfer of
this Security is  registrable in the Security  Register,  upon surrender of this
Security for  registration of transfer at the office or agency of the Company in
any place where the  principal  of (and  premium,  if any) and  interest on this
Security are payable,  duly endorsed by, or accompanied by a written  instrument
of transfer in form satisfactory to the Company and the Security  Registrar duly
executed by, the Holder hereof or his attorney duly  authorized in writing,  and
thereupon one or more new Securities of this series, of authorized denominations
and for the  same  aggregate  Face  Amount,  will be  issued  to the  designated
transferee or transferees.

               If  this  Security  is  a  Global  Security,   this  Security  is
exchangeable  only if the  Depository  is at any time  unwilling  or  unable  to
continue  as  depository  and a successor  depository  is not  appointed  by the
Company  within 90 days, or the  Depository  has ceased to be a clearing  agency
registered under the Securities  Exchange Act of 1934, as amended. In such case,
the Company  will issue  Securities  in  certificated  form in exchange for each
Global Security. In addition,  the Company may at any time determine not to have
Securities  represented  by a Global  Security  and, in such  event,  will issue
Securities in certificated form in exchange for the Global Security representing
such  Security.  In addition,  if there shall have occurred and be continuing an
Event of Default,  the Company will issue  Securities  in  certificated  form in
exchange  for  each  Global  Security.  In any  such  instance,  an  owner  of a
beneficial  interest in a Global Security will be entitled to physical  delivery
in certificated  form of Securities equal in principal amount to such beneficial
interest  and to have such  Securities  registered  in its name,  Securities  so
issued in certificated form will be issued in denominations of $100,000 (or such
other denomination as shall be specified by the Company) or any amount in excess
thereof which is an integral multiple of $1,000 and will be issued in registered
form only, without coupons.

               No  service  charge  shall be made for any such  registration  of
transfer or exchange, but the Company may require payment of a sum sufficient to
cover any tax or other governmental charge payable in connection therewith.

               Prior to due  presentment  of this Security for  registration  of
transfer,  the Company,  the Trustee and any agent of the Company or the Trustee
may treat the  Person in whose name this  Security  is  registered  as the owner
hereof for all purposes,  whether or not this  Security be overdue,  and neither
the  Company,  the Trustee nor any such agent shall be affected by notice to the
contrary.

               Section  13.  Events  of  Default.  If an Event of  Default  with
respect to the  Securities of this series shall have occurred and be continuing,
the  principal  of all the  Securities  of this series may be  declared  due and
payable in the manner and with the effect provided in the Indenture.



                                       14





               Section 14. Defined  Terms.  All terms in this Security which are
defined  in the  Indenture  shall  have  the  meanings  assigned  to them in the
Indenture,

               Section 15. Governing Law. This Security shall be governed by and
construed in accordance with the law of the State of New York.












                                       15





                            OPTION TO ELECT REPAYMENT

               The undersigned owner of this Security hereby  irrevocably elects
to have the  Company  repay the  principal  amount of this  Security  or portion
hereof below  designated at (i) the Optional  Repayment  Price  indicated on the
face hereof, if this Security is to be repaid pursuant to the Optional Repayment
provision  hereof,  or (ii) 100% of the principal  amount of this Security to be
repaid plus accrued  interest to the Optional Reset Date, if this Security is to
be repaid pursuant to the Optional  Interest Reset provision  hereof,  or to the
Original  Maturity  Date,  if this  Security  is to be  repaid  pursuant  to the
Optional Extension of Maturity provision hereof.



Dated:
      ----------------------------------     -----------------------------------
                                                         Signature

SIGNATURE GUARANTEED:                        Sign exactly as name appears on the
                                             front of this  Security  [SIGNATURE
                                             GUARANTEED   --  required  only  if
                                             Securities  are  to be  issued  and
                                             delivered   to   other   than   the
- ----------------------------------------     registered holder]

Principal amount to be repaid, if amount     Fill   in   for   registration   of
to be repaid is less than the  principal     Securities    if   to   be   issued
amount  of  this   Security   (principal     otherwise  than  to the  registered
amount  remaining  must be an authorized     holder:                            
denomination)                                
                                             Name:
                                                  ------------------------------

- ----------------------------------------     Address:
                                                     ---------------------------

                                             -----------------------------------
                                                (Please print name and address,
                                                       including  zip code)

                                                    SOCIAL SECURITY OR OTHER
                                                       TAXPAYER ID NUMBER


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









                                       16





                                  ABBREVIATIONS

               The following abbreviations,  when used in the inscription on the
face of this  instrument,  shall be construed as though they were written out in
full according to applicable laws or regulations:

               TEN COM              -       as tenants in common

               TEN ENT              -       as tenants by entireties

               JT TEN               -       as joint tenants with right of 
                                            survivorship and not as tenants
                                            in common

               UNIF GIFT MIN ACT    -             Custodian      
                                           -------         -------
                                           (Guest)         (Minor)

               Under Uniform Gifts to Minors Act
                                                -----------
                                                  (State)

     Additional abbreviations may also be used though not in the above list.










                                       17




        FOR VALUE  RECEIVED,  the  undersigned  hereby  sell(s),  assign(s)  and
transfer(s) unto



- --------------------------------------------------------------------------------
      Please print or type name and address, including zip code of assignee



- --------------------------------------------------------------------------------
          PLEASE INSERT SOCIAL SECURITY OR OTHER IDENTIFYING NUMBER OF
                                    ASSIGNEE



- --------------------------------------------------------------------------------
      the within Security of UNITED TECHNOLOGIES CORPORATION and all rights
          thereunder and does hereby irrevocably constitute and appoint


- --------------------------------------------------------------------------------
         to transfer the said Security on the books of the within-named
           Company, with full power of substitution in the premises.

Dated
     ----------------------------------

SIGNATURE GUARANTEED:
                                            ------------------------------------


                                            ------------------------------------
                                            NOTICE:   The   signature   to  this
                                            assignment  must correspond with the
                                            name as it  appears  upon the ace of
                                            the   within   Security   in   every
                                            particular,  without  alteration  or
                                            enlargement     or    any     change
                                            whatsoever.











                                       18