Swing check type.
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 5895-01-422-1398
NSN 5998-01-433-5451
NSN 5935-01-184-9361
NSN 5910-00-954-5514
NSN 5975-00-527-9656
NSN 5996-01-467-2177
NSN 6220-01-190-0627
NSN 5920-00-699-1927
NSN 2925-01-519-3221
NSN 6685-00-758-1162
NSN 6220-01-245-7783
NSN 6105-01-217-3762