<ARTICLE> 5
<LEGEND>
THE SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
COMPANY'S FORM 10-Q FOR THE FISCAL QUARTER ENDED SEPTEMBER 25, 1999 AND IS
QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS
</LEGEND>
<CIK> 0000089439
<NAME> MUELLER INDUSTRIES, INC.
<MULTIPLIER> 1,000

                             
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          DEC-25-1999
<PERIOD-END>                               SEP-25-1999
<CASH>                                         156,619
<SECURITIES>                                         0
<RECEIVABLES>                                  175,787
<ALLOWANCES>                                     5,323
<INVENTORY>                                    111,807
<CURRENT-ASSETS>                               443,275
<PP&E>                                         518,779
<DEPRECIATION>                                 142,840
<TOTAL-ASSETS>                                 924,822
<CURRENT-LIABILITIES>                          173,802
<BONDS>                                        131,427
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                           401
<OTHER-SE>                                     557,630
<TOTAL-LIABILITY-AND-EQUITY>                   924,822
<SALES>                                        869,062
<TOTAL-REVENUES>                               869,062
<CGS>                                          658,421
<TOTAL-COSTS>                                  658,421
<OTHER-EXPENSES>                               101,835
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                               9,086
<INCOME-PRETAX>                                106,813
<INCOME-TAX>                                    33,345
<INCOME-CONTINUING>                             73,468
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    73,468
<EPS-BASIC>                                       2.05
<EPS-DILUTED>                                     1.85