
<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          JUN-30-1995
<PERIOD-START>                             JUL-01-1994
<PERIOD-END>                               DEC-31-1994
<CASH>                                          32,685
<SECURITIES>                                    19,964
<RECEIVABLES>                                   28,000
<ALLOWANCES>                                         0
<INVENTORY>                                     25,706
<CURRENT-ASSETS>                               107,641
<PP&E>                                         129,146
<DEPRECIATION>                                  55,347
<TOTAL-ASSETS>                                 217,086
<CURRENT-LIABILITIES>                           14,073
<BONDS>                                          6,600
<COMMON>                                           193
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<OTHER-SE>                                     174,518
<TOTAL-LIABILITY-AND-EQUITY>                   217,086
<SALES>                                         67,741
<TOTAL-REVENUES>                                67,920
<CGS>                                           47,467
<TOTAL-COSTS>                                   56,722
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 445
<INCOME-PRETAX>                                 14,461
<INCOME-TAX>                                     4,210
<INCOME-CONTINUING>                             10,238
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                    10,238
<EPS-PRIMARY>                                      .54
<EPS-DILUTED>                                      .54
        

</TABLE>
