Level 1 requirements have been waived
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 6145-01-525-4231
NSN 6240-00-603-6662
NSN 6150-01-100-4337
NSN 5835-01-085-5487
NSN 5935-01-230-5846
NSN 6150-01-029-3272
NSN 5998-01-408-6018
NSN 5915-01-012-9707
NSN 5950-01-412-4932
NSN 5835-00-269-2232
NSN 6620-01-467-2111
NSN 5960-01-495-0859