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 6320-00-681-1324
NSN 5835-01-439-0180
NSN 6645-01-325-5605
NSN 5920-01-112-0730
NSN 5915-01-138-6516
NSN 5905-01-392-8207
NSN 5985-01-615-0463
NSN 6110-00-187-4537
NSN 6105-00-056-9776
NSN 5915-01-113-6834
NSN 5975-01-100-9702
NSN 6645-00-711-5381