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 6685-01-418-0925
NSN 6320-00-270-8222
NSN 5910-01-306-7458
NSN 5985-01-041-6029
NSN 6135-00-255-1340
NSN 5990-01-210-9788
NSN 5935-00-019-0246
NSN 5999-01-476-3170
NSN 5835-00-969-1920
NSN 5930-01-292-4677
NSN 6110-01-495-8524
NSN 5895-01-420-7802