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 5950-01-255-1879
NSN 6645-00-900-5830
NSN 5960-01-426-4242
NSN 5945-01-479-3463
NSN 6320-01-216-1678
NSN 4140-01-004-2146
NSN 6240-00-507-8987
NSN 5990-01-628-8188
NSN 5835-00-289-9080
NSN 6105-01-617-7085
NSN 5855-01-312-5160
NSN 6620-01-057-8739