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 5935-01-462-2755
NSN 5855-01-167-2162
NSN 5930-00-466-3643
NSN 6320-01-291-4870
NSN 5895-00-313-2446
NSN 6105-00-038-2954
NSN 5998-01-546-5663
NSN 6145-01-357-3110
NSN 6620-01-491-1434
NSN 6650-01-493-9985
NSN 6135-01-079-7852
NSN 7035-01-472-1999