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 6645-00-673-0337
NSN 5950-00-975-0555
NSN 6685-00-555-4198
NSN 6320-01-220-2264
NSN 5920-01-521-3087
NSN 5935-00-289-3903
NSN 6240-01-171-0374
NSN 5950-00-823-7799
NSN 5985-01-130-3988
NSN 5975-01-373-3981
NSN 5855-01-246-8273
NSN 6135-01-487-6275