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 6610-01-044-1860
NSN 6320-01-422-0765
NSN 5935-01-152-2606
NSN 5935-01-260-9642
NSN 5965-01-164-0561
NSN 5950-01-350-7615
NSN 6150-01-113-9665
NSN 6610-00-765-3283
NSN 5910-00-099-9998
NSN 5905-01-186-7296
NSN 2925-00-278-9468
NSN 4140-00-597-5260