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 5975-00-343-9466
NSN 6105-01-614-7419
NSN 5930-01-256-9629
NSN 5945-00-412-9652
NSN 6645-00-763-4852
NSN 6110-01-594-1028
NSN 5960-00-204-7506
NSN 6320-00-242-3300
NSN 4140-00-795-3747
NSN 5998-01-651-6167
NSN 5960-01-468-5785
NSN 5960-00-409-9604