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 5915-01-380-1464
NSN 5855-01-439-0776
NSN 5905-01-151-0633
NSN 5895-00-468-4103
NSN 5905-01-344-3857
NSN 6320-00-993-6120
NSN 6130-00-900-4758
NSN 6105-01-213-0778
NSN 5920-01-469-0202
NSN 6110-01-621-6332
NSN 6645-01-423-7760
NSN 6220-01-055-4538