MS9570C (NOTICE 1), MILITARY STANDARD: BOLT, MACHINE - DOUBLE HEXAGON EXTENDED WASHER HEAD, DRILLED, PD SHANK, AMS5731, .500-20 UNJF-3A (15 NOV 1991) [NO SUPERSEDING DOCUMENT].
MS9570C (NOTICE 1), MILITARY STANDARD: BOLT, MACHINE - DOUBLE HEXAGON EXTENDED WASHER HEAD, DRILLED, PD SHANK, AMS5731, .500-20 UNJF-3A (15 NOV 1991) [NO SUPERSEDING DOCUMENT].