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 5905-01-128-4429
NSN 6220-01-472-1251
NSN 6240-00-347-7118
NSN 5965-01-426-8325
NSN 6610-01-589-5146
NSN 6620-01-357-7751
NSN 5996-00-682-3841
NSN 5935-01-131-6615
NSN 5965-01-043-9357
NSN 5920-01-261-6358
NSN 6135-01-213-7339
NSN 6135-00-274-4035