Flange meets mil-f-20042
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 6220-00-100-6276
NSN 5950-01-534-6924
NSN 6135-01-238-2878
NSN 5855-01-464-1926
NSN 5998-01-310-6340
NSN 6620-00-672-1957
NSN 5915-01-351-8037
NSN 5895-00-514-2905
NSN 6620-00-531-6057
NSN 6150-01-097-3341
NSN 5910-01-029-8908
NSN 4140-01-295-8264