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 6645-01-592-7563
NSN 5985-01-429-0876
NSN 6110-01-303-2224
NSN 6685-01-585-2122
NSN 5910-00-511-9916
NSN 6320-01-418-6681
NSN 5935-01-351-4624
NSN 6150-01-328-8604
NSN 6620-00-383-8740
NSN 6610-01-610-9376
NSN 5998-01-192-7566
NSN 5855-01-487-5048