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 5990-00-991-8723
NSN 6650-01-130-6799
NSN 6610-00-161-7439
NSN 5996-00-253-3788
NSN 5985-00-919-2936
NSN 5910-00-439-5807
NSN 5935-01-327-3343
NSN 5835-00-074-3700
NSN 6220-01-179-1311
NSN 5895-00-260-1693
NSN 5996-00-496-8806
NSN 6610-01-351-4607