MS9566A (NOTICE 1), MILITARY STANDARD: BOLT, MACHINE-DOUBLE HEXAGON, EXTENDED WASHER HEAD, DRILLED, PD SHANK, AMS 5731, .250-28 UNJF-3A (04 OCT 1991) [SUPERSEDED BY SAE-AS9566].
MS9566A (NOTICE 1), MILITARY STANDARD: BOLT, MACHINE-DOUBLE HEXAGON, EXTENDED WASHER HEAD, DRILLED, PD SHANK, AMS 5731, .250-28 UNJF-3A (04 OCT 1991) [SUPERSEDED BY SAE-AS9566].