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 5905-01-439-5347
NSN 5910-01-033-3847
NSN 5835-01-580-7543
NSN 4140-01-581-3412
NSN 5835-01-259-0859
NSN 5915-00-717-5409
NSN 5960-01-447-1154
NSN 5999-01-314-2362
NSN 5990-01-575-3275
NSN 5925-00-324-2996
NSN 6650-01-058-0049
NSN 5960-01-120-6523