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 6220-00-463-4812
NSN 6150-01-541-2284
NSN 5950-00-300-4763
NSN 6130-01-136-7892
NSN 5965-01-492-0274
NSN 5895-00-539-1911
NSN 5965-00-204-8513
NSN 7035-00-529-3128
NSN 2925-01-228-6554
NSN 6240-01-381-2275
NSN 5990-00-226-7894
NSN 5996-01-532-1705