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 5920-01-087-0929
NSN 6610-01-023-1816
NSN 4140-01-616-4110
NSN 5999-01-634-0576
NSN 6110-01-085-0436
NSN 5915-00-051-6923
NSN 5905-01-422-1670
NSN 7035-01-444-4240
NSN 6150-01-024-2980
NSN 2925-00-180-2532
NSN 5920-01-053-9797
NSN 2925-01-310-3232