MS21285B, MILITARY STANDARD: BOLT, MACHINE-STEEL, DOUBLE HEXAGON, EXTENDED WASHER, .5625-18 (MIL-S-8879 THREAD) (17 SEP 1963) [SUPERSEDED BY MS9571]
MS21285B, MILITARY STANDARD: BOLT, MACHINE-STEEL, DOUBLE HEXAGON, EXTENDED WASHER, .5625-18 (MIL-S-8879 THREAD) (17 SEP 1963) [SUPERSEDED BY MS9571].