<ARTICLE> 5
<MULTIPLIER> 1,000
<CURRENCY> US DOLLARS
       
                             
<PERIOD-TYPE>                   12-MOS
<FISCAL-YEAR-END>                          MAY-31-1998
<PERIOD-START>                             JUN-01-1997
<PERIOD-END>                               MAY-31-1998
<EXCHANGE-RATE>                                      1
<CASH>                                          64,561
<SECURITIES>                                         7
<RECEIVABLES>                                  124,838
<ALLOWANCES>                                         0
<INVENTORY>                                    133,134
<CURRENT-ASSETS>                               329,064
<PP&E>                                         489,303
<DEPRECIATION>                                 293,440
<TOTAL-ASSETS>                                 551,610
<CURRENT-LIABILITIES>                          105,300
<BONDS>                                        162,573
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                        37,053
<OTHER-SE>                                     167,767
<TOTAL-LIABILITY-AND-EQUITY>                   551,610
<SALES>                                        747,402
<TOTAL-REVENUES>                               752,913
<CGS>                                          637,267
<TOTAL-COSTS>                                  637,267
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                              12,548
<INCOME-PRETAX>                                 55,437
<INCOME-TAX>                                    16,355
<INCOME-CONTINUING>                             39,082
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                (5,192)
<CHANGES>                                            0
<NET-INCOME>                                    33,890
<EPS-PRIMARY>                                     0.93
<EPS-DILUTED>                                     0.91