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 5920-00-017-2851
NSN 5990-01-582-1977
NSN 5910-01-451-4292
NSN 5915-01-367-6078
NSN 6650-00-966-5205
NSN 5975-01-100-3222
NSN 5910-00-103-5067
NSN 6240-00-594-7138
NSN 5930-01-204-8552
NSN 5895-01-451-3866
NSN 5996-01-394-3378
NSN 6645-01-172-1406