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 6135-00-299-6918
NSN 5996-00-681-8223
NSN 6105-01-527-7114
NSN 5905-00-840-6487
NSN 6320-00-857-4073
NSN 5925-01-544-2864
NSN 5985-01-406-5209
NSN 5985-01-596-0730
NSN 5895-01-188-0365
NSN 6220-01-627-7940
NSN 4140-00-972-5348
NSN 5990-01-574-2522