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 5965-01-396-3184
NSN 6145-01-050-7531
NSN 6620-01-529-7513
NSN 6130-01-330-4875
NSN 6650-00-299-9681
NSN 4140-00-927-1116
NSN 6150-01-244-3246
NSN 5910-01-329-6262
NSN 5999-00-911-4621
NSN 5996-01-614-2579
NSN 5915-00-018-8045
NSN 5999-01-551-7390