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 5855-01-423-0817
NSN 6135-01-459-1239
NSN 5920-01-331-9148
NSN 5990-01-123-6557
NSN 7035-00-849-5526
NSN 5960-00-631-8754
NSN 5999-00-219-8270
NSN 5999-01-220-2968
NSN 7035-00-238-3662
NSN 5975-00-148-4132
NSN 5960-00-170-6447
NSN 5855-01-616-6313