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 6105-01-308-7622
NSN 6150-00-285-2082
NSN 4140-01-634-0330
NSN 5975-01-044-5419
NSN 6650-01-382-8569
NSN 6620-01-239-9564
NSN 6240-01-516-2324
NSN 5935-00-146-0116
NSN 6110-00-449-2800
NSN 6685-01-418-6095
NSN 5835-01-426-0069
NSN 5925-00-866-9604