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 6620-00-239-6153
NSN 6610-01-510-8687
NSN 5990-00-627-5151
NSN 5920-01-651-5136
NSN 7035-00-320-5644
NSN 6105-01-569-0750
NSN 5965-01-055-0102
NSN 6645-01-281-7254
NSN 5920-01-288-4389
NSN 6135-00-134-6648
NSN 6145-01-487-1985
NSN 6610-00-769-6826