3a all ends thread class swivel feature on second end, 2 lock wire holes on first end, and 4 lock wire holes on second end passivate surface treated unf 1st end thread series
Used on aircraft: c-141, c-5, c-130, f-111, t-39, b-52, f-15, c-135, and the b-2.. 2.083" overall length fitting, oxygen hose weapon system essential; life support item; detail specification sheet, mil-dtl-7560/1, titled: valve assembly, oxygen cylinder, bailout zinc body surface treated male coupling half