<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM THE
UNAUDITED, CONSOLIDATED CONDENSED FINANCIAL STATEMENTS AND IS QUALIFIED IN ITS
ENTIRETY BY REFERENCE TO SUCH UNAUDITED CONSOLIDATED CONDENSED FINANCIAL
STATEMENTS.
</LEGEND>

                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-2000
<PERIOD-START>                             JAN-01-2000
<PERIOD-END>                               MAR-31-2000
<CASH>                                          98,139
<SECURITIES>                                         0
<RECEIVABLES>                                  125,166
<ALLOWANCES>                                   (1,333)
<INVENTORY>                                     49,568
<CURRENT-ASSETS>                               280,643
<PP&E>                                         397,670
<DEPRECIATION>                               (231,870)
<TOTAL-ASSETS>                                 479,019
<CURRENT-LIABILITIES>                           96,735
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                        13,056
<OTHER-SE>                                     347,828
<TOTAL-LIABILITY-AND-EQUITY>                   479,019
<SALES>                                        155,390
<TOTAL-REVENUES>                               155,390
<CGS>                                          122,555
<TOTAL-COSTS>                                  127,633
<OTHER-EXPENSES>                                 1,313
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                             (1,840)
<INCOME-PRETAX>                                 28,284
<INCOME-TAX>                                     9,829
<INCOME-CONTINUING>                             18,455
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    18,455
<EPS-BASIC>                                       0.70
<EPS-DILUTED>                                     0.70