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 6620-01-292-5072
NSN 5950-01-302-3332
NSN 6105-00-197-8671
NSN 5855-01-619-6124
NSN 5945-01-470-5157
NSN 5905-01-442-7682
NSN 5855-01-620-4801
NSN 4140-01-462-7058
NSN 6130-01-285-7587
NSN 5895-01-399-7571
NSN 5945-01-227-5095
NSN 6240-01-323-1228