MS9558D, MILITARY STANDARD: BOLT, MACHINE-DOUBLE HEXAGON EXTENDED WASHER HEAD, CORROSION AND HEAT RESISTANT STEEL, .3125-24 UNJF-3A (20 APR 1993) [SUPERSEDED BY SAE-AS9558].
MS9558D, MILITARY STANDARD: BOLT, MACHINE-DOUBLE HEXAGON EXTENDED WASHER HEAD, CORROSION AND HEAT RESISTANT STEEL, .3125-24 UNJF-3A (20 APR 1993) [SUPERSEDED BY SAE-AS9558].