MS9638 (NOTICE 1), MILITARY STANDARD: BOLT, MACHINE - HEXAGON HEAD, PD SHANK, TITANIUM AMS 4967, .500-20 UNJF-3A (04 OCT 1991) [SUPERSEDED BY SAE-AS9638].
MS9638 (NOTICE 1), MILITARY STANDARD: BOLT, MACHINE - HEXAGON HEAD, PD SHANK, TITANIUM AMS 4967, .500-20 UNJF-3A (04 OCT 1991) [SUPERSEDED BY SAE-AS9638].