Valve size 4.000 in.
A valve permitting flow in one direction only. It does not have a stem, except when equipped with a lever and weight and has no pressure adjustment. It may be inline or cartridge (manifold) design.
NSN 5999-01-089-2678
NSN 6685-01-311-5064
NSN 6320-01-339-8056
NSN 6320-00-519-0770
NSN 5950-00-686-4449
NSN 6130-01-350-2132
NSN 6105-00-455-1381
NSN 6650-00-246-3751
NSN 5999-01-260-3872
NSN 6240-01-420-7304
NSN 6650-00-473-1259
NSN 5930-00-518-1642