<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<RESTATED>

<S>                             <C>                     <C>                     <C>
<PERIOD-TYPE>                   3-MOS                   3-MOS                   3-MOS
<FISCAL-YEAR-END>                          SEP-30-1997             JUN-30-1997             MAR-31-1997
<PERIOD-START>                             JUL-01-1997             APR-01-1997             JAN-01-1997
<PERIOD-END>                               SEP-30-1997             JUN-30-1997             MAR-31-1997
<CASH>                                         279,511                 466,801               1,182,754
<SECURITIES>                                         0                       0                       0
<RECEIVABLES>                                4,644,933               5,068,214               4,530,668
<ALLOWANCES>                                         0                       0                       0
<INVENTORY>                                  8,652,422               7,366,957               7,000,819
<CURRENT-ASSETS>                            14,242,628              13,450,842              13,449,082
<PP&E>                                      11,487,879              11,227,193              11,074,098
<DEPRECIATION>                               3,692,774               3,411,277               3,160,048
<TOTAL-ASSETS>                              23,783,652              23,032,471              23,148,638
<CURRENT-LIABILITIES>                        4,477,135               4,244,065               4,193,429
<BONDS>                                              0                       0                       0
<PREFERRED-MANDATORY>                                0                       0                       0
<PREFERRED>                                    250,000                 250,000                 250,000
<COMMON>                                        23,124                  23,124                  23,124
<OTHER-SE>                                   7,603,423               7,477,814               7,404,414
<TOTAL-LIABILITY-AND-EQUITY>                23,783,652              23,032,471              23,148,638
<SALES>                                      8,693,449               9,039,176               8,564,846
<TOTAL-REVENUES>                             8,693,449               9,039,176               8,564,846
<CGS>                                        7,128,714               7,383,860               7,044,357
<TOTAL-COSTS>                                7,128,714               7,383,860               7,044,357
<OTHER-EXPENSES>                             1,112,038               1,135,721               1,136,063
<LOSS-PROVISION>                                     0                       0                       0
<INTEREST-EXPENSE>                             236,459                 260,264                 183,671
<INCOME-PRETAX>                                216,238                 259,331                 200,755
<INCOME-TAX>                                    75,683                  92,079                  68,000
<INCOME-CONTINUING>                            140,555                 167,252                 132,755
<DISCONTINUED>                                       0                       0                       0
<EXTRAORDINARY>                                      0                       0                       0
<CHANGES>                                            0                       0                       0
<NET-INCOME>                                   140,555                 167,252                 132,755
<EPS-PRIMARY>                                      .06                     .07                     .06
<EPS-DILUTED>                                      .06                     .07                     .06


</TABLE>