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 5910-01-539-5417
NSN 6145-01-468-5467
NSN 6220-01-139-7340
NSN 2925-00-928-5931
NSN 6620-00-760-4332
NSN 5975-00-986-6186
NSN 6105-01-221-5955
NSN 6645-00-758-0870
NSN 7035-01-492-3376
NSN 5999-01-499-3188
NSN 6645-01-110-4491
NSN 5985-01-551-0890