<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<MULTIPLIER> 1,000
       
<S>                             <C>                     <C>                     <C>
<PERIOD-TYPE>                   3-MOS                   6-MOS                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1997             DEC-31-1997             DEC-31-1997
<PERIOD-START>                             JAN-01-1997             JAN-01-1997             JAN-01-1997
<PERIOD-END>                               MAR-30-1997             JUN-29-1997             SEP-28-1997
<CASH>                                             625                   1,914                     403
<SECURITIES>                                         0                   1,033                   1,396
<RECEIVABLES>                                   18,817                  22,133                  23,039
<ALLOWANCES>                                       288                     293                     296
<INVENTORY>                                     30,742                  30,904                  32,505
<CURRENT-ASSETS>                                50,346                  56,156                  57,652
<PP&E>                                          27,350                  32,187                  35,835
<DEPRECIATION>                                   6,189                   6,981                   7,840
<TOTAL-ASSETS>                                  79,755                  88,757                  92,843
<CURRENT-LIABILITIES>                           20,570                  17,957                  19,346
<BONDS>                                              0                       0                       0
<PREFERRED-MANDATORY>                                0                       0                       0
<PREFERRED>                                         52                      52                      52
<COMMON>                                            16                      37                      37
<OTHER-SE>                                      12,493                  42,624                  45,709
<TOTAL-LIABILITY-AND-EQUITY>                    79,755                  88,757                  92,843
<SALES>                                         32,202                  69,452                 107,336
<TOTAL-REVENUES>                                32,202                  69,452                 107,336
<CGS>                                           22,969                  49,183                  75,164
<TOTAL-COSTS>                                   22,969                  49,183                  75,164
<OTHER-EXPENSES>                                 4,340                   9,422                  15,014
<LOSS-PROVISION>                                     0                       0                       0
<INTEREST-EXPENSE>                               1,265                   2,328                   2,994
<INCOME-PRETAX>                                  3,628                   8,519                  14,164
<INCOME-TAX>                                     1,459                   3,417                   5,674
<INCOME-CONTINUING>                              2,169                   5,102                   8,490
<DISCONTINUED>                                       0                       0                       0
<EXTRAORDINARY>                                      0                       0                       0
<CHANGES>                                            0                       0                       0
<NET-INCOME>                                     2,169                   5,102                   8,490
<EPS-PRIMARY>                                     1.35                    2.28                    3.11
<EPS-DILUTED>                                     0.32                    0.68                    1.07
        

</TABLE>