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 5998-00-842-5458
NSN 5920-00-790-7906
NSN 6150-01-188-5048
NSN 5965-01-226-5006
NSN 6110-00-071-2008
NSN 6650-01-523-9850
NSN 6650-01-199-4054
NSN 5950-00-390-5986
NSN 5920-01-019-3685
NSN 5905-00-635-7438
NSN 6320-00-194-4252
NSN 5920-01-548-1703