标准摘要 Cross Reference: AMS2645,AMS4967,ANSI Y14.5M,AS478,AS7461,AS870,ASME B46.1,ASME Y14.36M,ASTME1417 展开完整摘要 英文名称BOLT, MACHINE - DOUBLE HEXAGON EXTENDED WASHER HEAD, DRILLED, CLOSE TOLERANCE SHANK, AMS4967, .250-28 UNJF-3A