Thd series designator is non-std
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.
Classification: Check valves of steel
NSN 5975-01-592-3231
NSN 7035-00-896-3213
NSN 5920-01-177-6352
NSN 6240-01-032-0712
NSN 6620-01-065-8265
NSN 6150-01-617-8120
NSN 5910-01-115-5143
NSN 5925-01-537-1140
NSN 6240-00-426-1972
NSN 5990-01-387-0623
NSN 5999-01-291-6446
NSN 6685-00-171-8134