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 6650-00-003-5413
NSN 6645-01-263-5481
NSN 5925-01-238-4607
NSN 5985-01-381-1018
NSN 5920-00-162-9945
NSN 6685-01-382-5296
NSN 5920-01-612-8212
NSN 5998-00-234-5640
NSN 5965-00-289-6280
NSN 5930-00-933-1788
NSN 6320-00-360-1744
NSN 5905-01-597-2947