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 5998-01-227-9798
NSN 5965-00-518-0958
NSN 5945-01-129-6110
NSN 5975-00-272-2913
NSN 7035-00-946-2642
NSN 6105-00-607-3297
NSN 6320-00-284-1524
NSN 5910-01-542-8835
NSN 5960-00-872-9264
NSN 5999-01-394-9506
NSN 5920-00-539-6989
NSN 5999-00-306-0958