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 5895-01-552-1676
NSN 6685-00-067-9314
NSN 5990-01-628-8188
NSN 5960-01-355-2968
NSN 5910-00-165-0001
NSN 4140-01-376-9818
NSN 4140-01-580-0277
NSN 6610-01-502-8868
NSN 5910-01-479-9129
NSN 7035-01-127-9019
NSN 5935-00-221-3720
NSN 5985-01-486-5023