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 6620-01-250-1692
NSN 6685-01-281-2627
NSN 5835-00-140-8646
NSN 7035-01-525-3239
NSN 5935-01-105-3772
NSN 6650-01-417-3287
NSN 6610-01-495-0596
NSN 5855-01-325-9507
NSN 6650-01-105-0209
NSN 5945-00-860-0805
NSN 5950-00-563-3143
NSN 5996-00-431-9895