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 5990-01-196-2953
NSN 5910-00-350-8321
NSN 5905-00-880-3718
NSN 5935-01-078-1011
NSN 5915-00-353-0853
NSN 5855-01-464-3152
NSN 5975-01-441-1290
NSN 5905-01-351-1842
NSN 5935-00-267-1658
NSN 5999-00-226-4703
NSN 2925-01-474-3363
NSN 6135-01-655-1759