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 2925-01-127-0167
NSN 5935-00-332-1498
NSN 5960-01-134-4099
NSN 5960-01-458-7999
NSN 6110-00-157-1699
NSN 5930-01-015-3603
NSN 5895-01-176-3246
NSN 5960-00-587-7517
NSN 6620-01-500-9847
NSN 6650-01-338-6042
NSN 6685-00-393-6435
NSN 5985-00-467-1838