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 6645-01-437-7770
NSN 5915-00-591-7831
NSN 5910-00-850-4025
NSN 5945-01-548-5811
NSN 5996-01-116-2523
NSN 5910-01-061-1443
NSN 6105-01-037-2656
NSN 5920-01-371-3112
NSN 5950-01-044-5704
NSN 5945-00-228-6921
NSN 4140-01-596-2105
NSN 5925-01-331-6994