MS9575B, MILITARY STANDARD: BOLT, MACHINE-DOUBLE HEXAGON EXTENDED WASHER HEAD, DRILLED, PD SHANK, SILVER PLATED, .250-28 UNJF-3A (30 SEP 1989) [SUPERSEDED BY SAE-AS9575].
MS9575B, MILITARY STANDARD: BOLT, MACHINE-DOUBLE HEXAGON EXTENDED WASHER HEAD, DRILLED, PD SHANK, SILVER PLATED, .250-28 UNJF-3A (30 SEP 1989) [SUPERSEDED BY SAE-AS9575].