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 5998-00-321-5541
NSN 5935-00-259-9841
NSN 5960-01-412-0619
NSN 5960-01-493-3948
NSN 6220-01-352-9825
NSN 6320-01-415-0953
NSN 6145-00-715-1186
NSN 6110-01-611-7266
NSN 5996-00-501-4326
NSN 6240-01-332-9214
NSN 5910-00-730-4730
NSN 5985-01-264-1881