<ARTICLE>                                       5
                              
<MULTIPLIER>                                                1000
                                                 
                                                                                        
<PERIOD-TYPE>                                   3-MOS            6-MOS           9-MOS            12-MOS
<FISCAL-YEAR-END>                               DEC-31-1996      DEC-31-1996     DEC-31-1996      DEC-31-1996
<PERIOD-END>                                    MAR-31-1996      JUN-30-1996     SEP-29-1996      DEC-31-1996
<CASH>                                                      1464            5955            12040             7611
<SECURITIES>                                                   0               0                0                0
<RECEIVABLES>                                              41390           48659            38917            27621
<ALLOWANCES>                                                   0               0                0                0
<INVENTORY>                                                54145           40182            33051            42262
<CURRENT-ASSETS>                                          113115           98276            87849            81532
<PP&E>                                                    149538          151677           152105           145135
<DEPRECIATION>                                            100934          102536           107201            99475
<TOTAL-ASSETS>                                            180238          166215           156257           154079
<CURRENT-LIABILITIES>                                      59905           39196            32778            32660
<BONDS>                                                    30000           30000            30000            30000
<PREFERRED-MANDATORY>                                          0               0                0                0
<PREFERRED>                                                    0               0                0                0
<COMMON>                                                   41135           40686            40900            41457
<OTHER-SE>                                                 40884           47171            44154            42010
<TOTAL-LIABILITY-AND-EQUITY>                              180238          166215           156257           154079
<SALES>                                                    51128          120526           186289           230314
<TOTAL-REVENUES>                                           51128          120526           186289           230314
<CGS>                                                      37552           84195           129842           163435
<TOTAL-COSTS>                                              37552           84195           162332           202543
<OTHER-EXPENSES>                                               0               0                0                0
<LOSS-PROVISION>                                               0               0                0                0
<INTEREST-EXPENSE>                                           746            1588             2155             2571
<INCOME-PRETAX>                                             5077           14889            21802            25200
<INCOME-TAX>                                                1987            5895             8632             9979
<INCOME-CONTINUING>                                         3090            8994            13170            15221
<DISCONTINUED>                                               267               0                0             (711)
<EXTRAORDINARY>                                                0               0                0                0
<CHANGES>                                                      0               0                0                0
<NET-INCOME>                                                3357            8994            13170            14510
<EPS-PRIMARY>                                               0.43            1.14             1.68             1.88
<EPS-DILUTED>                                               0.42            1.12             1.64             1.84