<PAGE>

                                   SIXTH AMENDMENT

                                          TO

                        AMENDED AND RESTATED CREDIT AGREEMENT


          THIS SIXTH AMENDMENT TO AMENDED AND RESTATED CREDIT AGREEMENT dated as
of January 21, 1998 (this "SIXTH AMENDMENT"), is entered into between Kaynar
Technologies Inc., a Delaware corporation (the "BORROWER") and General Electric
Capital Corporation, a New York corporation (the "LENDER") and relates to that
certain Amended and Restated Credit Agreement dated as of August 12, 1996,
between the Borrower and the Lender (as previously amended as of December 17,
1996, April 30, 1997, June 25, 1997, October 23, 1997 and December 5, 1997, the
"CREDIT AGREEMENT").

                                 W I T N E S S E T H:

          WHEREAS, the Borrower and the Lender have entered into the Credit
Agreement; and

          WHEREAS, the Borrower has requested that the Lender amend the Credit
Agreement to permit the Borrower to consummate the acquisition of all of the
assets and assumption of certain of the liabilities (the "ACQUISITION") of
Aerospace Precision Systems, Inc. (the "TARGET") from the Burns Heirs' Trust
(the "SELLER"), as described in the draft dated January 18, 1998 of the Asset
Purchase Agreement between the Borrower and the Seller;

          NOW, THEREFORE, in consideration of the above premises, the Borrower
and the Lender agree as follows:

     1.   DEFINITIONS.  Capitalized terms used and not otherwise defined herein
have the meanings assigned to them in the Credit Agreement.

     2.   AMENDMENTS TO THE CREDIT AGREEMENT.  Upon the "Effective Date" (as
defined in SECTION 4 below), the Credit Agreement is hereby amended as follows:

               2.1  AMENDMENTS TO SECTION 1.01.  Section 1.01 of the Credit
Agreement is amended by adding the following definitions in proper alphabetical
order:

               "APSI" means Aerospace Precision Systems, Inc., a California
          corporation.

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               "APSI PURCHASE AGREEMENT" means the Asset Purchase Agreement
          between the Borrower and the Burns Heirs' Trust with respect to the
          purchase by the Borrower of the assets of APSI, as delivered to and
          approved by the Lender.

               2.2  AMENDMENT TO SECTION 7.13.  Section 7.13 of the Credit
Agreement is hereby amended by adding the following at the beginning of the
first sentence thereof:

          Other than in the case of the Facility Leases (as defined in the APSI
          Purchase Agreement),

               2.3  AMENDMENT TO SECTION 8.01.  Section 8.01 of the Credit 
Agreement is hereby amended by deleting the word "and" at the end of clause 
(xi) thereof, substituting "; and" in place of the period at the end of 
clause (xii) thereof and adding the following new clause (xiii):

               (xiii)  Indebtedness assumed pursuant to the APSI Purchase
          Agreement in an aggregate principal amount not to exceed $1,500,000,
          PROVIDED that such Indebtedness shall be paid in full on or before the
          second Business Day after the closing of the purchase by the Borrower
          of the assets of APSI.

               2.3  AMENDMENT TO SECTION 8.03.  Section 8.03 of the Credit
Agreement is hereby amended by deleting the word "and" at the end of clause
(iii) thereof, substituting "; and" in place of the period at the end of clause
(iv) thereof and adding the following new clause (v):

               (v)  Liens on assets of APSI securing Indebtedness permitted
          under SECTION 8.01(xiii).

               2.4  AMENDMENT TO SECTION 8.04.  Section 8.04 of the Credit
Agreement is hereby amended by deleting the word "and" at the end of clause
(viii) thereof, substituting "; and" in place of the period at the end of clause
(ix) thereof and adding the following new clause (x):

               (x)  the Investment in the assets, and assumption of certain
          liabilities, of APSI pursuant to the APSI Purchase Agreement.

               2.5  AMENDMENT TO SECTION 8.12.  Section 8.12 of the Credit
Agreement is hereby amended by deleting the word "and" at the end of clause
(iii) thereof, substituting "; and" in place of the period at the end of clause
(iv) thereof and adding the following new clause (v):

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          (v)  Common Stock issued as consideration for the purchase of assets
          of APSI pursuant to the APSI Purchase Agreement.

     3.   REPRESENTATIONS AND WARRANTIES.  The Borrower hereby represents and
warrants to the Lender that, as of the Effective Date and after giving effect to
this Sixth Amendment:

          (a)  All of the representations and warranties of the Borrower
     contained in this Sixth Amendment, the Credit Agreement and the other Loan
     Documents are true and correct in all material respects on and as of the
     Effective Date and on and as of the consummation of the Acquisition (the
     "ACQUISITION CLOSING DATE"), in each case as if then made (other than
     representations and warranties which expressly speak as of a different
     date, which shall be true and correct in all material respects as of that
     date);

          (b)  No Potential Event of Default or Event of Default has occurred or
     is continuing or will result after giving effect to this Sixth Amendment
     and the consummation of the Acquisition; and

          (c)  The representations and warranties of the Sellers (as defined in
     the APSI Purchase Agreement) set forth in the APSI Purchase Agreement are
     true and correct in all material respects on and as of the Acquisition
     Closing Date, in each case as if then made (other than representations and
     warranties which expressly speak as of a different date, which shall be
     true and correct in all material respects as of that date).

     4.   EFFECTIVE DATE.  This Sixth Amendment shall become effective as of the
date first written above (the "EFFECTIVE DATE") upon the satisfaction of each of
the following conditions:

          (a)  the Lender shall have received each of the following documents,
     in each case in form and substance satisfactory to the Lender:

               (i)  counterparts hereof executed by the Borrower and the Lender;

               (ii)  a certificate of the chief financial officer of the
          Borrower certifying that all conditions precedent to the effectiveness
          of this Sixth Amendment have been satisfied;

               (iii)  a certificate of the Secretary or Assistant Secretary of
          the Borrower dated the Effective Date certifying (A) the names and
          true signatures of the incumbent officers of the Borrower authorized
          to sign this Sixth Amendment and the APSI Purchase Agreement, (B) that
          the By-laws of the Borrower have not been amended or otherwise
          modified since the date of the most recent certification thereof by
          the Secretary or Assistant Secretary of the 

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          Borrower delivered to the Lender and remain in full force and 
          effect as of the Effective Date, (C) that the Articles of 
          Incorporation of the Borrower have not been amended or otherwise 
          modified since the date of the most recent certification thereof by 
          the Secretary of State of Delaware delivered to the Lender and 
          remain in full force and effect as of the Effective Date, (D) the 
          resolutions of the Borrower's board of directors approving and 
          authorizing the execution, delivery and performance of this Sixth 
          Amendment and the APSI Purchase Agreement and the purchase of the 
          assets of APSI and (E) that the APSI Purchase Agreement (including 
          the exhibits and schedules thereto), as delivered to the Lender, 
          has not been amended or modified since the date of its delivery to 
          the Lender and remains in full force and effect;

               (iv)  evidence of publication of notice and filing with
          Governmental Authorities pursuant to applicable bulk sales laws
          (including without limitation Division 6 of the Uniform Commercial
          Code);

               (v)  search reports (under APSI and each other name used within
          the past five years to conduct the business to which the assets of
          APSI relate) with respect to filings under the Uniform Commercial Code
          (as in effect in each applicable jurisdiction) in each jurisdiction in
          which assets of APSI are, or may be deemed to be, located;

               (vi)  a list of the street addresses of all offices and other
          locations at which assets of APSI with an aggregate value in excess of
          $50,000 are, or are proposed to be, located;

               (vii)  a list of all defined benefit plans as defined in Section
          3(35) of ERISA (other than a "multiemployer plan") subject to Title IV
          of ERISA in respect of which APSI or any of its ERISA Affiliates
          (determined by substituting "APSI" for "Borrower" in the definition of
          "ERISA Affiliate") is, or within the immediately preceding six (6)
          years was, an "employer" as defined in Section 3(5) of ERISA; and

               (viii)  such additional documentation as the Lender may
          reasonably request;

          (b)  no law, regulation, order, judgment or decree of any Governmental
     Authority shall, and the Lender shall not have received any notice that
     litigation is pending or threatened which is likely to, enjoin, prohibit or
     restrain the consummation of the Acquisition or any other transactions
     contemplated by this Sixth Amendment, except for such laws, regulations,
     orders or decrees, or pending or threatened litigation that in the
     aggregate could not reasonably be expected to result in a Material Adverse
     Effect;

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          (c)  all of the representations and warranties of the Borrower
     contained in this Sixth Amendment, the Credit Agreement and the other Loan
     Documents shall be true and correct in all material respects on and as of
     the Effective Date and on and as of the Acquisition Closing Date, in each
     case as if then made (other than representations and warranties which
     expressly speak as of a different date, which shall be true and correct in
     all material respects as of that date);

          (d)  all corporate and other proceedings, and all documents,
     instruments and other legal matters in connection with the Acquisition and
     any other transactions contemplated by this Sixth Amendment shall be
     satisfactory in all respects in form and substance to the Lender; and

          (e)  no Event of Default or Potential Event of Default shall have
     occurred and be continuing on the Effective Date or the Acquisition Closing
     Date or will result after giving effect to this Sixth Amendment and the
     consummation of the Acquisition.

     5.   REFERENCE TO AND EFFECT ON THE LOAN DOCUMENTS.

          (a)  Upon the Effective Date, each reference in the Credit Agreement
     to "this Agreement", "hereunder", "hereof" or words of like import, and
     each reference in the other Loan Documents to the Credit Agreement, shall
     mean and be a reference to the Credit Agreement as amended hereby.

          (b)  This Sixth Amendment shall be limited solely to the matters
     expressly set forth herein and shall not (i) constitute an amendment of any
     other term or condition of the Credit Agreement or any other Loan Document,
     (ii) prejudice any right or rights which the Lender or Lender Parties may
     now have or may have in the future under or in connection with the Credit
     Agreement or any other Loan Document, (iii) require the Lender to agree to
     a similar transaction on a future occasion or (iv) create any rights herein
     to another Person or other beneficiary or otherwise, except to the extent
     specifically provided herein.

          (c)  Except to the extent specifically consented to herein, the
     respective provisions of the Credit Agreement and the other Loan Documents
     shall not be amended, modified, impaired or otherwise affected hereby, and
     such documents and the Obligations under each of them are hereby confirmed
     in full force and effect.

     6.   MISCELLANEOUS.  This Sixth Amendment is a Loan Document.  The headings
herein are for convenience of reference only and shall not alter or otherwise
affect the meaning hereof.

     7.   COUNTERPARTS.  This Sixth Amendment may be executed in any number of
counterparts and by the different parties hereto in separate counterparts, each
of which when 

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so executed and delivered shall be an original, but all of which
shall together constitute one and the same instrument.

     8.   GOVERNING LAW.  THIS SIXTH AMENDMENT SHALL BE INTERPRETED, AND THE
RIGHTS AND LIABILITIES OF THE PARTIES HERETO DETERMINED, IN ACCORDANCE WITH THE
LAW OF THE STATE OF NEW YORK.

          IN WITNESS WHEREOF, the Borrower and the Lender have caused this Sixth
Amendment to be executed by their respective officers thereunto duly authorized
as of the date first above written.  


                                       KAYNAR TECHNOLOGIES INC.


                                       By:  
                                            ---------------------------
                                            David A. Werner
                                            Executive Vice President



                                       GENERAL ELECTRIC CAPITAL CORPORATION


                                       By:  
                                            ---------------------------
                                            Name:
                                            Authorized Signatory



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