EXHIBIT 4.5
                                  FOURTH AMENDMENT
                                         TO
                                  CREDIT AGREEMENT

                    THIS FOURTH AMENDMENT TO CREDIT AGREEMENT (this
          "Amendment"), dated as of December 1, 1995, by and between BARNES
          GROUP, INC. (the "Borrower"), the Lenders parties to the Credit
          Agreement (as defined below) from time to time (the "Lenders"),
          and MELLON BANK, N.A., a national banking association, as Agent
          (in such capacity, the "Agent").

                    WHEREAS, the Agent, the Lenders and the Borrower are
          parties to a certain Credit Agreement dated as of December 1,
          1991 (as amended, the "Credit Agreement"); and

                    WHEREAS, the Borrower has requested that the Lenders
          extend the Revolving Credit Maturity Date for a period of one
          year;

                    WHEREAS, the Agent, the Lenders and the Borrower desire
          to amend the Credit Agreement as set forth herein; and

                    WHEREAS, all words and terms used in this Amendment
          which are defined in the Credit Agreement are used herein with
          the same meanings unless otherwise defined herein or required by
          the context;

                    NOW, THEREFORE, in consideration of the foregoing
          premises and intending to be legally bound, the Agent, the
          Lenders and the Borrower hereby agree as follows:

                    Section 1.  Extension of Revolving Credit Maturity Date.
                                -------------------------------------------
          Pursuant to Section 2.03 of the Credit Agreement and as requested
          by the Borrower in a letter to the Agent dated October 2, 1995,
          the Lenders and the Agent hereby agree to extend the Revolving
          Credit Maturity Date for a period of one year.  On and after
          December 6, 1995 (the "Effective Date"), as provided in Section
          2.03 of the Credit Agreement, the Revolving Credit Maturity Date
          shall be December 6, 2000, as such date may be further extended by
          the Lenders pursuant to Section 2.03 of the Credit Agreement.

                    Section 2.  Conditions.  The obligation of the Agent
                                ----------
          and the Lenders to extend the Revolving Credit Maturity Date
          shall be subject to satisfaction by the Borrower of the following
          conditions precedent:

                         (a)   The Agent shall have received (with a copy
                    for each Lender) the following documents dated as of
                    the date of the issuance of the Amendment (the "Closing
                    Date") and in form and substance satisfactory to the
                    Lenders:


                         (i)  An executed counterpart of this Amendment;
                         and

                         (ii)  A certificate signed by a duly authorized
                         officer of the Borrower stating that (A) the
                         representations and warranties contained in
                         Article III of the Credit Agreement (except for
                         Section 3.06 which continues to be true as of the
                         date set forth therein) are correct on and as of
                         the Closing Date and as though made on and as of
                         the Closing Date and (B) no Event of Default and
                         no event, act or omission which, with the giving
                         of notice or the lapse of time or both, would
                         constitute such an Event of Default has occurred
                         and is continuing or would result from the
                         execution and delivery of the Amendment.

                         (b)  The Agent shall have received (with a copy
                    for each Lender) such other approvals, certificates,
                    opinions or documents, in form and substance
                    satisfactory to the Lenders, as the Lenders may
                    reasonably request.

                    Section 3.  Effect of Amendment.  The Credit Agreement,
                                 -------------------
          as amended by this Amendment, is in all respects ratified,
          approved and confirmed and shall, as so amended, remain in full
          force and effect.  From and after the date hereof, all references
          in any document or instrument to the Credit Agreement shall mean
          and include the Credit Agreement, as amended by this Amendment.

                    Section 4.  Governing Law.  This Amendment shall be
                                -------------
          governed by and shall be interpreted and enforced in accordance
          with the laws of the State of New York.

                    Section 5.  Counterparts.  This Amendment may be
                                ------------
          executed in any number of counterparts and by the different
          parties hereto on separate counterparts, each of which
          counterparts, when so executed and delivered, shall be deemed to
          be an original, and all of which counterparts, taken together,
          shall constitute but one and the same Amendment.

                    Section 6.  Expenses.  The Borrower shall reimburse the
                                --------
          Lenders for all costs and expenses (including fees and expenses
          of counsel to the Agent) incurred in connection with this
          Amendment.
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                    IN WITNESS WHEREOF, the parties hereto have caused this
          Amendment to be duly executed and delivered by their respective
          officers thereunto duly authorized.

                                        BARNES GROUP, INC.

                                        By /s/ John J. Locher      
                                          --------------------------
                                        Title   V.P. Treasurer     
                                             -----------------------

                                        MELLON BANK, N.A.,
                                        individually and as Agent

                                        By /s/ J. Paul Marotta        
                                          -----------------------------
                                        Title  Assistant Vice President
                                             --------------------------

                                        CHEMICAL BANK

                                        By /s/ Scott S. Ward       
                                          --------------------------
                                        Title  Vice President      
                                             -----------------------

                                        SHAMUT BANK, N.A.

                                        By /s/ Paul A. Veiga       
                                          --------------------------
                                        Title  Vice President
                                             -----------------------

                                        NBD BANK, N.A.

                                        By /s/ Carolyn J. Parks    
                                          --------------------------
                                        Title  Vice President      
                                             -----------------------

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                                        SOCIETY NATIONAL BANK

                                        By /s/ Lawrence A. Mack    
                                          --------------------------
                                        Title  Vice President      
                                             -----------------------

                                        FLEET BANK, N.A.

                                        By /s/ Marlene K. Haddad   
                                          --------------------------
                                        Title  Vice President      
                                             -----------------------

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