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As filed with the Securities and Exchange Commission on July 19, 2006
Registration No. 333-74821
==============================================================================

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

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

POST-EFFECTIVE AMENDMENT NO. 1
TO
FORM S-8
REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933

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COMPX INTERNATIONAL INC.
(Exact name of registrant as specified in its charter)

Delaware                                        57-0981653
(State or other jurisdiction                          (I.R.S. Employer
of incorporation or                              Identification No.)
organization)

Three Lincoln Centre
5430 LBJ Freeway, Suite 1700
Dallas, Texas                                       75240-2697
(Address of principal                                   (Zip Code)
executive offices)

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COMPX CONTRIBUTORY RETIREMENT PLAN 

(As successor by merger to The 401(k) Plan of the Fort Lock
Corporation)
(Full title of the plan)

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A. Andrew R. Louis, Esq.
Three Lincoln Centre
5430 LBJ Freeway, Suite 1700
Dallas, Texas 75240-2697
(972) 233-1700
(Name, address and telephone number
including area code of agent for service)

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DEREGISTRATION

On December 31, 2000, The 401(k) Plan of the Fort Lock  Corporation  merged
into the CompX  Contributory  Retirement  Plan  (formerly  known as the National
Cabinet Lock, Inc.  Contributory  Retirement Plan), with the CompX  Contributory
Retirement   Plan  surviving  the  merger.   On  December  31,  2005  the  CompX
Contributory Retirement Plan merged into another retirement plan, with the other
plan surviving the merger. The surviving plan of the December 31, 2005 merger no
longer offered to participants  the option to purchase or sell shares of class A
common  stock,  par  value  $0.01 per share  ("Class  A Common  Stock"),  of the
registrant. Any shares of Class A Common Stock held by a participant of the plan
were sold  prior to  December  31,  2005.  Accordingly,  the  registrant  hereby
deregisters  all unsold  shares of the  500,000  shares of Class A Common  Stock
initially registered under this registration statement.

SIGNATURES

Pursuant to the  requirements of the Securities Act of 1933, the registrant
certifies  that it has  reasonable  grounds  to  believe  that it meets  all the
requirements  for  filing  on Form S-8 and has  duly  caused  this  registration
statement  to be  signed  on its  behalf  by  the  undersigned,  thereunto  duly
authorized, in the city of Dallas, Texas, on July 19, 2006:

COMPX INTERNATIONAL INC.

By: /s/ A. Andrew R. Louis
---------------------------
A. Andrew R.
Louis Secretary

Pursuant to the  requirements  of the Securities  Act, this  Post-Effective
Amendment No. 1 to the  Registration  Statement has been signed by the following
persons in the capacities and on the dates indicated:

Signature                         Title                        Date
---------------------------        ---------------------         -------------

*                                  Chairman of the Board         July 19, 2006
---------------------------
Glenn R. Simmons

*                                 Vice Chairman of the           July 19, 2006
---------------------------       Board, President and
David A. Bowers                   Chief Executive
Officer (Principal 
Executive Officer)

/s/ Darryl R. Halbert             Vice President, Chief          July 19, 2006
---------------------------       Financial Officer and
Darryl R. Halbert                 Controller (Principal
Financial and
Accounting Officer)

Signature                         Title                        Date
---------------------------        ---------------------         -------------

*                                  Director                      July 19, 2006
---------------------------
Paul M. Bass, Jr.

*                                  Director                      July 19, 2006
---------------------------
Edward J. Hardin

*                                  Director                      July 19, 2006
---------------------------
Ann Manix

*By:     /s/ A. Andrew R. Louis
----------------------
A. Andrew R. Louis 
Attorney-in-Fact

Pursuant to the  requirements  of the Securities Act, the plan committee of
The  CompX  Contributory  Retirement  Plan has  duly  caused  this  registration
statement  to be  signed  on  its  behalf  by  the  undersigned  thereunto  duly
authorized, in the city of Dallas, state of Texas, on July 19, 2006.

The CompX Contributory 
Retirement Plan

By: CompX International Inc. 
as the sponsor of The 
CompX Contributory 
Retirement Plan

/s/ Darryl R. Halbert
-----------------------
Darryl R. Halbert Vice 
President, Chief 
Financial Officer and 
Controller