SECURITIES AND EXCHANGE COMMISSION

                              WASHINGTON, D.C. 20549


                                     FORM 8-K

                                  CURRENT REPORT


                      Pursuant to Section 13 or 15(d) of the
                          Securities Exchange Act of 1934

                 Date of Report (Date of earliest event reported):
                                 December 10, 1997



                                   TriMas Corporation    
              (Exact name of registrant as specified in its charter)



    Delaware                            1-10716                    38-2687639  
(State or other jurisdiction          (Commission             (I.R.S.Employer
of incorporation)                     File Number)             Identification
No.)


               315 E. Eisenhower Parkway, Ann Arbor, Michigan 48108
               (Address of principal executive offices)  (Zip Code)

         Registrant's telephone number, including area code (313)747-7025





ITEM 1.     CHANGES IN CONTROL OF REGISTRANT

      On December 10, 1997, TriMas Corporation (the "Company") entered into an
Agreement and Plan of Merger, dated as of December 10, 1997, with MascoTech,
Inc. ("MascoTech") and MascoTech Acquisition, Inc., a wholly owned subsidiary of
MascoTech ("Merger Sub"), which has been amended by Amendment No. 1 to Agreement
and Plan of Merger dated as of December 15, 1997 (as so amended, the "Merger
Agreement").  Reference is made to the Merger Agreement, a copy of which is 
filed as Exhibit 2 to this Current Report on Form 8-K, the provisions of which 
are incorporated herein by reference.  Pursuant to the terms of the Merger 
Agreement, Merger Sub has commenced an offer to purchase any and all 
outstanding shares (the "Shares") of common stock of the Company at a price of 
$34.50 per Share, net to the seller in cash.  The tender offer is being made 
pursuant to an Offer to Purchase, dated December 17, 1997, and the related 
Letter of Transmittal (the "Offer").  The Offer is conditioned upon, among other
things, there being validly tendered and not withdrawn prior to the expiration 
of the Offer such number of the then issued and outstanding Shares (not 
including Shares tendered by MascoTech, its subsidiaries or its Chief 
Executive Officer or by Masco Corporation), which represents at least a 
majority of the then issued and outstanding Shares (excluding for purposes of
this calculation all Shares owned by MascoTech, its subsidiaries or its Chief
Executive officer or by Masco Corporation and all Shares that may not be 
tendered pursuant to the Offer because they are subject to restrictions under
certain Company stock plans).

      The Merger Agreement provides, among other things, that as promptly as
practicable after the purchase of Shares pursuant to the Offer and the
satisfaction of other conditions set forth in the Merger Agreement, in 
accordance with the Delaware General Corporation Law, Merger Sub will be merged 
with and into the Company (the "Merger"), with the Company continuing as the 
surviving corporation.  At the effective time of the Merger (the "Effective 
Time"), each Share outstanding immediately prior to the Effective Time (other
than Shares held in the treasury of the Company, Shares owned by MascoTech or 
its subsidiaries or Shares as to which appraisal rights have been exercised) 
shall be converted into the right to receive $34.50 in cash.

      Consummation of the Merger is subject to certain conditions, including the
purchase of Shares pursuant to the Offer, approval of the Company's shareholders
if required under applicable law, the expiration of any applicable waiting 
period under the Hart-Scott-Rodino Antitrust Improvements Act of 1976, and there
being no provision of any applicable law or regulation and no judgment, 
injunction, order or decree prohibiting the consummation of Merger.  Neither the
Offer nor the Merger is conditioned on MascoTech or Merger Sub obtaining 
financing.  There can be no assurance that the Offer or the Merger will be 
consummated.

      The press releases issued (i) December 11, 1997 by the Company and 
MascoTech and (ii) December 17, 1997 by MascoTech are attached hereto as 
Exhibits 99.a and 99.b, respectively.

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ITEM 7.     FINANCIAL STATEMENTS AND EXHIBITS

         (c)   Exhibits.

         2     Agreement and Plan of Merger dated as of December 10, 1997, as
               amended by Amendment No. 1 dated as of December 15, 1997, among
               TriMas Corporation, MascoTech, Inc. and MascoTech Acquisition, 
               Inc. (incorporated by reference to Annex A to the Offer to 
               Purchase dated December 17, 1997 filed as Exhibit (a)(1) to the 
               Tender Offer Statement on Schedule 14D-1 of MascoTech, Inc. 
               and MascoTech Acquisition, Inc. dated December 17, 1997, filed 
               pursuant to Section 14(d)(1) of the Securities Exchange Act of 
               1934).

         99.a  Press Release issued by TriMas Corporation and MascoTech, Inc.
               dated December 11, 1997 (incorporated by reference to Exhibit
               (a)(8) to the Tender Offer Statement on Schedule 14D-1 of 
               MascoTech, Inc. and MascoTech Acquisition, Inc. dated December 
               17, 1997 filed pursuant to Section 14(d)(1) of the Securities 
               Exchange Act of 1934).

         99.b  Press Release issued by MascoTech, Inc. dated December 17, 1997
               (incorporated by reference to Exhibit (a)(9) to the Tender Offer
               Statement on Schedule 14D-1 of MascoTech, Inc. and MascoTech 
               Acquisition, Inc. dated December 17, 1997 filed pursuant to 
               Section 14(d)(1) of the Securities Exchange Act of 1934).


                                          3



                                    SIGNATURES

      Pursuant to the requirements of the Securities Exchange Act of 1934, the
Registrant has duly caused this Report to be signed on its behalf by the
undersigned thereunto duly authorized.

                                                TriMas Corporation


                                                By:/s/Brian P. Campbell
                                                      Brian P. Campbell
                                                      Its: President

Dated: December 22, 1997

                                          4




                                   EXHIBIT INDEX



      2        Agreement and Plan of Merger dated as of December 10, 1997, as
               amended by Amendment No. 1 dated as of December 15, 1997, among
               TriMas Corporation, MascoTech, Inc. and MascoTech Acquisition, 
               Inc. (incorporated by reference to Annex A to the Offer to 
               Purchase dated December 17, 1997 filed as Exhibit (a)(1) to the 
               Tender Offer Statement on Schedule 14D-1 of MascoTech, Inc. 
               and MascoTech Acquisition, Inc. dated December 17, 1997, filed 
               pursuant to Section 14(d)(1) of the Securities Exchange Act of 
               1934).

      99.a     Press Release issued by TriMas Corporation and MascoTech, Inc.
               dated December 11, 1997 (incorporated by reference to Exhibit
               (a)(8) to the Tender Offer Statement on Schedule 14D-1 of 
               MascoTech, Inc. and MascoTech Acquisition, Inc. dated December
               17, 1997 filed pursuant to Section 14(d)(1) of the Securities 
               Exchange Act of 1934).

      99.b     Press Release issued by MascoTech, Inc. dated December 17, 1997
               (incorporated by reference to Exhibit (a)(9) to the Tender Offer
               Statement on Schedule 14D-1 of MascoTech, Inc. and MascoTech 
               Acquisition, Inc. dated December 17, 1997 filed pursuant to 
               Section 14(d)(1) of the Securities Exchange Act of 1934).