MS21965 (NOTICE 1), MILITARY SPECIFICATION: NIPPLE, BREAK OFF, EMERGENCY OXYGEN CYLINDER VALVE (06 OCT 1986) [SUPERSEDED BY MIL-DTL-7560/1]
MS21965 (NOTICE 1), MILITARY SPECIFICATION: NIPPLE, BREAK OFF, EMERGENCY OXYGEN CYLINDER VALVE (06 OCT 1986) [SUPERSEDED BY MIL-DTL-7560/1].