MS9213A, MILITARY STANDARD:BOLT, MACHINE-STEEL, DIFFUSED NICKEL-CADMIUM PLATED, DOUBLE HEXAGON EXTENDED WASHER HEAD, .500-20 UNJF-3A (27 MAY 1988).
MS9213A, MILITARY STANDARD:BOLT, MACHINE-STEEL, DIFFUSED NICKEL-CADMIUM PLATED, DOUBLE HEXAGON EXTENDED WASHER HEAD, .500-20 UNJF-3A (27 MAY 1988).