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 5996-00-903-3224
NSN 5999-01-261-3945
NSN 5985-01-441-4033
NSN 6620-01-516-6116
NSN 5925-01-367-7924
NSN 6135-00-170-8819
NSN 5935-00-702-7220
NSN 5990-01-565-2226
NSN 6620-00-068-2503
NSN 6610-01-258-6206
NSN 6130-01-132-6376
NSN 5910-01-010-1817