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 5920-01-569-1383
NSN 5999-00-005-3847
NSN 6610-00-597-5671
NSN 6685-00-221-4435
NSN 6610-01-219-1656
NSN 6320-01-141-3791
NSN 6110-01-444-4288
NSN 5996-01-141-6916
NSN 6650-00-520-4253
NSN 6645-00-754-4108
NSN 6620-01-274-3423
NSN 2925-01-218-5556