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 6130-00-981-5575
NSN 4140-00-617-0984
NSN 5990-00-258-0228
NSN 5998-01-483-1426
NSN 6240-00-012-8155
NSN 4140-01-212-6964
NSN 6610-00-890-0254
NSN 6105-01-437-6431
NSN 5965-00-431-2492
NSN 7035-01-591-2039
NSN 5930-01-032-6125
NSN 6620-01-114-0841