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 5895-01-647-9109
NSN 5920-00-665-2885
NSN 6150-00-442-7866
NSN 6135-01-079-7852
NSN 5930-01-091-4818
NSN 5975-01-589-1665
NSN 6150-01-465-5475
NSN 6320-00-070-4544
NSN 6610-00-424-8780
NSN 6620-01-468-2795
NSN 5935-01-474-5095
NSN 6650-00-973-4468