MS21291B (NOTICE-1), MILITARY STANDARD: BOLT, MACHINE - STEEL, DRILLED DOUBLE HEXAGON, EXTENDED WASHER, .375-24 (MIL-S-8879 THREAD) (01-APR-1992) [REPLACED BY MS9577]

MS21291B (NOTICE-1), MILITARY STANDARD: BOLT, MACHINE - STEEL, DRILLED DOUBLE HEXAGON, EXTENDED WASHER, .375-24 (MIL-S-8879 THREAD) (01-APR-1992) [REPLACED BY MS9577]., MS21291B, is inactive for new design and is replaced by MS9577.