MS9728D, MILITARY STANDARD: BOLT, MACHINE - DOUBLE HEXAGON, EXTENDED WASHER HEAD, CLOSE TOLERANCE SHANK, CORROSION AND HEAT RESISTANT STEEL, .500-20 UNJF-3A (24 FEB 1986) [NO SUPERSEDING DOCUMENT].
MS9728D, MILITARY STANDARD: BOLT, MACHINE - DOUBLE HEXAGON, EXTENDED WASHER HEAD, CLOSE TOLERANCE SHANK, CORROSION AND HEAT RESISTANT STEEL, .500-20 UNJF-3A (24 FEB 1986) [NO SUPERSEDING DOCUMENT].