MS9579C, MILITARY STANDARD: BOLT, MACHINE - DOUBLE HEXAGON EXTENDED WASHER HEAD, DRILLED, PD SHANK, AMS 5731, SILVER PLATED, .500-20 UNJF-3A (27 JUN 1984) [SUPERSEDED BY SAE-AS9579].
MS9579C, MILITARY STANDARD: BOLT, MACHINE - DOUBLE HEXAGON EXTENDED WASHER HEAD, DRILLED, PD SHANK, AMS 5731, SILVER PLATED, .500-20 UNJF-3A (27 JUN 1984) [SUPERSEDED BY SAE-AS9579].