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 5930-01-090-6756
NSN 5910-00-594-0221
NSN 6645-01-519-3007
NSN 5935-01-414-9998
NSN 2925-01-327-3069
NSN 6645-01-056-5291
NSN 5950-00-125-7586
NSN 6105-00-776-7205
NSN 5950-00-223-8989
NSN 6650-01-483-4267
NSN 6650-00-342-6447
NSN 4140-01-382-3864