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 6220-01-189-7990
NSN 5920-00-738-1131
NSN 5998-01-207-0088
NSN 6130-01-213-0196
NSN 6685-01-032-3384
NSN 5910-01-438-9209
NSN 5855-01-604-0801
NSN 6105-01-535-7024
NSN 6150-00-920-4448
NSN 6650-01-494-2084
NSN 5990-01-321-2997
NSN 5960-01-468-6508