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 5999-01-178-4116
NSN 6105-01-573-9302
NSN 5950-01-151-2817
NSN 6110-01-310-7186
NSN 6105-01-648-4431
NSN 6105-00-639-6857
NSN 5935-00-643-9995
NSN 5985-01-161-5823
NSN 5905-01-230-4223
NSN 6220-00-272-7497
NSN 6110-00-214-9186
NSN 5975-00-232-1785