Exhibit 99.1

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

     In connection with the Quarterly Report of Mueller Industries, Inc. (the
"Company") on Form 10-Q for the period ending June 28, 2003 as filed with the
Securities and Exchange Commission on the date hereof (the "Report"), I,
William D. O'Hagan, Chief Executive Officer of the Company, certify, pursuant
to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the
Sarbanes-Oxley Act of 2002, that:

     (1)  The Report fully complies with the requirements of Section 13(a) or
          15(d) of the Securities Exchange Act of 1934; and

     (2)  The information contained in the Report fairly presents, in all
          material respects, the financial condition and results of
          operations of the Company.



                                       /s/ William D. O'Hagan
                                       William D. O'Hagan
                                       Chief Executive Officer
                                       July 28, 2003