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 5905-01-113-6633
NSN 6240-01-171-0374
NSN 6220-01-465-2469
NSN 5965-01-660-2341
NSN 5920-00-097-7648
NSN 5985-00-432-9049
NSN 5950-01-457-7024
NSN 7035-01-100-2796
NSN 5895-00-222-9904
NSN 6145-00-610-6987
NSN 5950-01-434-2514
NSN 5910-00-737-1617