MS21292B, MILITARY STANDARD: BOLT, MACHINE - STEEL, DRILLED, DOUBLE HEXAGON, EXTENDED WASHER, .4375-20 (MIL-S-8879 THREAD) (17 SEP 1963)
MS21292B, MILITARY STANDARD: BOLT, MACHINE - STEEL, DRILLED, DOUBLE HEXAGON, EXTENDED WASHER, .4375-20 (MIL-S-8879 THREAD) (17 SEP 1963).