Third end is bulkhead type ms33657
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 6645-01-343-6077
NSN 5960-01-128-7784
NSN 5855-00-973-5717
NSN 5920-01-058-7648
NSN 5855-00-149-0766
NSN 6220-00-124-4743
NSN 2925-01-583-5619
NSN 5855-01-431-8834
NSN 6110-01-211-7209
NSN 5835-01-351-8429
NSN 6620-00-443-7587
NSN 5835-00-174-7763