MS9221A, MILITARY STANDARD: BOLT, MACHINE-STEEL DIFFUSED NICKEL-CADMIUM PLATE, DOUBLE HEXAGON EXTENDED WASHER HEAD, DRILLED, .4375-20 UNJF-3A (09 MAY 1998).
MS9221A, MILITARY STANDARD: BOLT, MACHINE-STEEL DIFFUSED NICKEL-CADMIUM PLATE, DOUBLE HEXAGON EXTENDED WASHER HEAD, DRILLED, .4375-20 UNJF-3A (09 MAY 1998).