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 6620-00-553-8854
NSN 5960-01-632-6576
NSN 5945-00-919-8494
NSN 5960-01-424-1781
NSN 5915-00-826-3457
NSN 4140-01-142-8340
NSN 5910-00-864-9311
NSN 5965-00-314-5303
NSN 5950-01-608-5667
NSN 5855-01-259-0995
NSN 5965-00-479-3026
NSN 6240-01-043-3595