MS9728D (NOTICE 1), MILITARY STANDARD: BOLT, MACHINE - DOUBLE HEXAGON, EXTENDED WASHER HEAD, CLOSE TOLERANCE SHANK, CORROSION AND HEAT RESISTANT STEEL, .500-20 UNJF-3A (21 OCT 1991) [NO SUPERSEDING DOCUMENT].
MS9728D (NOTICE 1), MILITARY STANDARD: BOLT, MACHINE - DOUBLE HEXAGON, EXTENDED WASHER HEAD, CLOSE TOLERANCE SHANK, CORROSION AND HEAT RESISTANT STEEL, .500-20 UNJF-3A (21 OCT 1991) [NO SUPERSEDING DOCUMENT].