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 6135-01-487-5336
NSN 6105-01-215-0579
NSN 6130-01-624-6262
NSN 2925-01-448-2880
NSN 5996-01-194-3289
NSN 5925-00-948-0064
NSN 5930-00-422-1188
NSN 5925-01-303-7424
NSN 5990-01-578-5382
NSN 5990-00-691-2697
NSN 5950-01-534-6776
NSN 5965-01-458-5299