Valve size 4.000 in.
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.
NSN 5920-01-660-0352
NSN 5975-01-498-7920
NSN 6620-01-152-9453
NSN 5920-00-073-1528
NSN 5855-01-610-9426
NSN 6650-00-905-9317
NSN 6685-00-217-9010
NSN 5998-00-302-3957
NSN 5990-00-539-7859
NSN 5920-01-369-6385
NSN 5935-01-052-1902
NSN 5998-01-485-0348