MS21277B (NOTICE 1), MILITARY STANDARD: SCREW, MACHINE - STEEL, DOUBLE HEXAGON, EXTENDED WASHER, .138-40 (MIL-S-8879 THREAD) (21 OCT 1991) [NO SUPERSEDING DOCUMENT]

MS21277B (NOTICE 1), MILITARY STANDARD: SCREW, MACHINE - STEEL, DOUBLE HEXAGON, EXTENDED WASHER, .138-40 (MIL-S-8879 THREAD) (21 OCT 1991) [NO SUPERSEDING DOCUMENT].