MS9566A, MILITARY STANDARD: BOLT, MACHINE-DOUBLE HEXAGON, EXTENDED WASHER HEAD, DRILLED, PD SHANK, AMS 5731, .250-28 UNJF-3A (17 NOV 1969) [SUPERSEDED BY SAE-AS9566].
MS9566A, MILITARY STANDARD: BOLT, MACHINE-DOUBLE HEXAGON, EXTENDED WASHER HEAD, DRILLED, PD SHANK, AMS 5731, .250-28 UNJF-3A (17 NOV 1969) [SUPERSEDED BY SAE-AS9566].