MS9158A, MILITARY STANDARD: BOLT-MACHINE, STEEL, 12 POINT HEAD, .250-28, BLACK OXIDE (22 JUN 1987) [SUPERSEDED BY SAE-AS9158].
MS9158A, MILITARY STANDARD: BOLT-MACHINE, STEEL, 12 POINT HEAD, .250-28, BLACK OXIDE (22 JUN 1987) [SUPERSEDED BY SAE-AS9158].