MS9218, MILITARY STANDARD: BOLT, MACHINE - STEEL, AMS 6304, DIFFUSED NICKEL-CADMIUM PLATE, DOUBLE HEXAGON EXTENDED WASHER HEAD, DRILLED, .250-28 UNJF-

MS9218, MILITARY STANDARD: BOLT, MACHINE - STEEL, AMS 6304, DIFFUSED NICKEL-CADMIUM PLATE, DOUBLE HEXAGON EXTENDED WASHER HEAD, DRILLED, .250-28 UNJF-3A (10 DEC 1963) [SUPERSEDED BY SAE-AS9218].