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 6110-00-216-8112
NSN 5950-01-264-7255
NSN 5895-00-834-2110
NSN 6105-00-333-2581
NSN 5835-00-572-7445
NSN 4140-01-371-1565
NSN 6650-01-019-1550
NSN 6645-01-605-4351
NSN 6620-01-106-3553
NSN 6240-00-937-6083
NSN 5935-01-017-9536
NSN 6110-01-553-1244