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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C.   205492015

FORM SD

Specialized Disclosure Report

(Exact name of registrant as specified in its charter)

Jane Grimm

Vice President and Secretary

CompX International Inc.

Three Lincoln Centre

5430 LBJ Freeway, Suite 1700

Dallas, Texas  75240-2697

(972) 233-1700

(Name and telephone number, including area code, of the person to contact in connection with this report.)

Check the appropriate box to indicate the rule pursuant to which this form is being filed, and provide the period to which the information in this form applies:

Section 1 - Conflict Minerals Disclosure

Item 1.01 Conflict Minerals Disclosure and Report

Conflict Minerals Disclosure

For the calendar year 2017, we assessed whether any conflict minerals, as defined in Item 1.01(d)(3) of Form SD, were necessary to the functionality or production of a product we manufactured or contracted to be manufactured.  We determined that certain conflict minerals were necessary to the functionality of products we manufactured.

Accordingly, we conducted in good faith a reasonable country of origin inquiry regarding the conflict minerals in our products for the calendar year 2017.  We designed our inquiry to determine whether such conflict minerals originated in the Democratic Republic of the Congo or an adjoining country, as defined in Item 1.01(d)(1) of Form SD, or were from recycled or scrap sources, as defined in Item 1.01(d)(6) of Form SD.  We sent a certification letter to each of our vendors who were approved vendors during 2017.  We sent a total of 451 of such certification letters (one to each vendor with a unique vendor identification number within our computer systems).  An approved vendor may have more than one vendor identification number because, among other things, the vendor may have multiple locations and each location has a separate vendor identification number.  The certification letter required each recipient to support one response and, if necessary, we followed-up with the vendor in order to ensure we received a response.  A summary of the responses regarding each such vendor's product is as follows.

With respect to the two responses regarding conflict minerals originating or possibly originating in the Democratic Republic of the Congo or an adjoining company, we contacted the vendors.  Both vendors provide products from the electronic component industry with extensive product lines, and may be primarily a distributor for a large number of lower level manufacturers in the supply chain. In each case we purchase relatively few item SKUs compared to total vendor offerings.  The vendors informed us that they have made efforts to ensure conflict free sourcing, expect suppliers to source responsibly, or are in various stages of compliance.  Neither of the two vendors directly provides product specific reports as to the sourcing of their conflict minerals.  These conditions create a level of uncertainty related to the term "possibly originating" as it relates to the specific products the registrant purchases from such vendors.  As a result (and even though we were able to satisfy ourselves, by further researching the manufacturers sourced by such vendors, that certain specific products sourced from these vendors did not fall into the fourth category above), the registrant does not have sufficient information to assess whether all of the products it purchased from such vendors did not contain some amount of one or more conflict minerals originating or possibly originating in the Democratic Republic of the Congo or an adjoining country.  The total value of the registrant's purchases from these vendors (not including purchases from these vendors of products that we were able to remove from the fourth category by further researching manufacturers) represents an aggregate of 0.06% of total purchases from all of the registrant's vendors in 2017.

Based on the registrant's good faith, reasonable country of origin inquiry, the registrant does not know or have reason to believe that the conflict minerals in the registrant's products have originated from the Democratic Republic of the Congo or an adjoining country.

This Conflicts Minerals Disclosure is also posted on our website at

http://compxinternational.gcs-web.com/conflict-minerals-disclosure

SIGNATURE

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 hereunto duly authorized.