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 6650-00-107-8509
NSN 5950-01-369-7824
NSN 5960-01-481-3722
NSN 5950-00-586-3564
NSN 5950-01-419-0044
NSN 5998-01-265-8582
NSN 5945-01-446-3389
NSN 7035-01-528-9042
NSN 5985-01-414-4928
NSN 6150-01-644-3184
NSN 6145-01-529-7653
NSN 6145-01-255-7477