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 5945-01-632-8815
NSN 5835-01-279-2580
NSN 5920-01-597-0121
NSN 6610-00-861-0487
NSN 5945-00-151-4623
NSN 5930-01-213-8428
NSN 5950-00-415-1889
NSN 5990-01-038-5020
NSN 6150-00-779-5547
NSN 4140-00-617-0984
NSN 5960-00-927-6716
NSN 5950-01-245-7780