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 5985-01-231-4254
NSN 6135-01-205-5965
NSN 6610-01-010-3915
NSN 6620-01-283-1338
NSN 6620-00-736-8457
NSN 5960-01-420-4744
NSN 6105-01-136-2629
NSN 5930-00-442-0893
NSN 5915-01-331-1075
NSN 5905-00-912-1059
NSN 5855-01-610-9557
NSN 5835-01-442-6482