<ARTICLE> 5 <MULTIPLIER> 1,000 <PERIOD-TYPE> YEAR <FISCAL-YEAR-END> DEC-31-1997 <PERIOD-START> JAN-01-1997 <PERIOD-END> DEC-31-1997 <CASH> 7,170 <SECURITIES> 0 <RECEIVABLES> 62,812 <ALLOWANCES> 1,058 <INVENTORY> 90,714 <CURRENT-ASSETS> 178,911 <PP&E> 463,689 <DEPRECIATION> 290,067 <TOTAL-ASSETS> 383,852 <CURRENT-LIABILITIES> 78,312 <BONDS> 17,905 <PREFERRED-MANDATORY> 0 <PREFERRED> 0 <COMMON> 22,227 <OTHER-SE> 214,586 <TOTAL-LIABILITY-AND-EQUITY> 383,852 <SALES> 433,801 <TOTAL-REVENUES> 433,801 <CGS> 320,792 <TOTAL-COSTS> 397,452 <OTHER-EXPENSES> 172 <LOSS-PROVISION> 153 <INTEREST-EXPENSE> 553 <INCOME-PRETAX> 35,471 <INCOME-TAX> 9,874 <INCOME-CONTINUING> 25,597 <DISCONTINUED> 0 <EXTRAORDINARY> 0 <CHANGES> 0 <NET-INCOME> 25,597 <EPS-PRIMARY> 1.58 <EPS-DILUTED> 1.56