<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
CONDENSED CONSOLIDATED BALANCE SHEET AT JUNE 28, 1998 AND THE CONDENSED
CONSOLIDATED STATEMENT OF OPERATIONS FOR THE SIX MONTHS ENDING JUNE 28,
1998 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL 
STATEMENTS.
</LEGEND>
<MULTIPLIER> 1,000
       
                                      
<PERIOD-TYPE>                                    6-MOS
<FISCAL-YEAR-END>                          DEC-31-1998
<PERIOD-START>                             JAN-01-1998
<PERIOD-END>                               JUN-28-1997
<CASH>                                               0
<SECURITIES>                                         0
<RECEIVABLES>                                  105,056
<ALLOWANCES>                                         0
<INVENTORY>                                     50,155
<CURRENT-ASSETS>                               164,824
<PP&E>                                         255,581
<DEPRECIATION>                                 161,113
<TOTAL-ASSETS>                                 319,182
<CURRENT-LIABILITIES>                          130,865
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                         5,138
<OTHER-SE>                                     154,746
<TOTAL-LIABILITY-AND-EQUITY>                   319,182
<SALES>                                        223,319
<TOTAL-REVENUES>                               223,319
<CGS>                                          172,941
<TOTAL-COSTS>                                  172,941
<OTHER-EXPENSES>                                 3,951
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 783
<INCOME-PRETAX>                                 13,770
<INCOME-TAX>                                     5,738
<INCOME-CONTINUING>                              8,032
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                     8,032
<EPS-PRIMARY>                                     1.56
<EPS-DILUTED>                                     1.49