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 6145-00-299-7757
NSN 6220-01-119-0742
NSN 7035-01-411-6062
NSN 5998-01-094-7550
NSN 5925-01-387-9630
NSN 6320-00-977-3930
NSN 5998-01-587-9536
NSN 5925-01-386-3178
NSN 4140-01-534-3962
NSN 5985-00-847-1744
NSN 5999-01-177-9194
NSN 6220-01-099-6581