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 5990-01-172-4553
NSN 5990-01-086-4825
NSN 5855-01-327-5129
NSN 5930-01-424-0276
NSN 5895-01-233-3712
NSN 5975-01-274-2448
NSN 6320-00-270-8222
NSN 5990-01-386-5561
NSN 5950-01-466-3043
NSN 6145-00-988-0855
NSN 5910-01-358-0161
NSN 5950-01-605-3104