2.5 inch female thread connections.
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 5930-00-456-0530
NSN 6650-01-290-4001
NSN 6240-01-580-2748
NSN 5998-00-058-7816
NSN 6105-00-259-1692
NSN 6145-01-153-1413
NSN 5855-00-149-0766
NSN 6685-01-522-3526
NSN 6650-00-410-8705
NSN 5998-01-398-7233
NSN 5965-01-371-1297
NSN 6220-00-264-9473