MS9557E (NOTICE 1), MILITARY STANDARD: BOLT, MACHINE-DOUBLE HEXAGON EXTENDED WASHER HEAD, CORROSION AND HEAT RESISTANT STEEL, .250-28 UNJF-3A (31 AUG 2000) [SUPERSEDED BY SAE-AS9557].
MS9557E (NOTICE 1), MILITARY STANDARD: BOLT, MACHINE-DOUBLE HEXAGON EXTENDED WASHER HEAD, CORROSION AND HEAT RESISTANT STEEL, .250-28 UNJF-3A (31 AUG 2000) [SUPERSEDED BY SAE-AS9557].