MIL-DTL-2-60 Valve, Cylinder, Gas: Oxygen-Helium Mixture \(Helium Over 80 Percent\), Outlet 500, Medical \(Pressures Through 3000 Psig \(20680 Kpa\) At 120 Deg. F \(48.9 Deg. C\)\) \(S/S By A-A-59860\)