SECURITIES AND EXCHANGE COMMISSION

                            Washington, D.C. 20549


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                                   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): April 30, 2003


                             NL INDUSTRIES, INC.
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              (Exact name of registrant as specified in charter)



New Jersey                        1-640                13-5267260
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(State or other           (Commission File No.)     (Employer ID No.)
jurisdiction of
incorporation)



16825 Northchase Dr., Suite 1200, Houston, Texas                      77060
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(Address of principal executive offices)                           (Zip Code)



Registrant's telephone number, including area code       (281) 423-3300
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                               Not Applicable
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        (Former name or former address, if changed since last report)


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Item 7.
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c)    Exhibits

99.1  Press Release dated April 30, 2003.


Item 9.     Regulation FD Disclosure.
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     On April 30,  2003,  NL  Industries,  Inc.  ("NL")  issued a press  release
announcing  its first  quarter  2003  earnings.  A copy of the press  release is
attached as Exhibit 99.1.

     This  information  furnished  under "Item 9.  Regulation FD  Disclosure" is
intended to be furnished  under "Item 12.  Results of  Operations  and Financial
Condition" in accordance with SEC Release No. 33-8216.

     The information in this Form 8-K and the Exhibit  attached hereto shall not
be deemed  "filed" for purposes of Section 18 of the Securities Act of 1934, nor
shall it be deemed  incorporated by reference in any filing under the Securities
Act of 1933,  except as shall be  expressly  set forth by specific  reference in
such filing.

     The press release includes  information  regarding  certain  non-U.S.  GAAP
(generally accepted accounting principles) financial measures. The press release
includes  NL's reasons for including  such  non-U.S.  GAAP measures as well as a
reconciliation of such measures to related U.S. GAAP measures.


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<PAGE>


                                  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 thereunto duly authorized.


                                          NL INDUSTRIES, INC.
                                          (Registrant)



                                          /s/Robert D. Hardy
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                                          Robert D. Hardy
                                          Vice President, Chief Financial
                                          Officer & Controller


Dated: April 30, 2003