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 5935-01-523-0063
NSN 6645-00-038-7737
NSN 6240-01-394-5320
NSN 2925-01-572-9472
NSN 5895-01-352-6674
NSN 5996-01-630-5243
NSN 6320-01-029-2196
NSN 6620-01-560-7832
NSN 6650-01-490-5205
NSN 5910-00-552-5015
NSN 6145-01-352-4913
NSN 6110-01-623-4696