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 6610-00-492-1508
NSN 6105-01-541-8223
NSN 5915-00-231-3783
NSN 5910-00-840-4395
NSN 6650-00-144-4555
NSN 5910-01-223-1796
NSN 5945-00-548-4727
NSN 6105-01-294-9019
NSN 5998-00-141-9872
NSN 6145-01-487-1985
NSN 6320-00-731-6134
NSN 6320-00-360-1744