An item with internal machine threads designed to fit the external machine threads of a tube fitting. It has flat faces, one of which has a counterbored recess to accommodate packing, packing or sealing ring(s), gasket(s), and the like. The item, when installed, provides a method of locking and sealing the connection. See also locknut, pipe; nut (1), tube coupling and nut (1), plain, hexagon.
NSN 6650-00-992-4540
NSN 5985-00-204-0028
NSN 6220-01-177-2731
NSN 5895-01-645-0305
NSN 4140-01-143-2523
NSN 5945-00-652-6846
NSN 5998-01-268-1753
NSN 5920-01-322-1365
NSN 6130-00-583-9925
NSN 2925-01-067-4446
NSN 5915-00-542-2179
NSN 5910-01-435-5151