MS21285B (NOTICE 1), MILITARY STANDARD: BOLT, MACHINE-STEEL, DOUBLE HEXAGON, EXTENDED WASHER, .5625-18 (MIL-S-8879 THREAD) (21 OCT 1991) [SUPERSEDED BY MS9571]

MS21285B (NOTICE 1), MILITARY STANDARD: BOLT, MACHINE-STEEL, DOUBLE HEXAGON, EXTENDED WASHER, .5625-18 (MIL-S-8879 THREAD) (21 OCT 1991) [SUPERSEDED BY MS9571].