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 5925-00-113-0017
NSN 4140-00-890-3043
NSN 5975-00-848-6468
NSN 6620-01-250-1692
NSN 6320-01-452-2394
NSN 6130-01-613-0792
NSN 5996-01-472-2858
NSN 6220-00-783-6178
NSN 5960-01-240-3266
NSN 4140-01-481-2542
NSN 5925-01-451-5700
NSN 7035-01-312-3577