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 5945-00-310-1477
NSN 5910-01-462-2440
NSN 5855-01-634-0259
NSN 5945-01-516-9383
NSN 6110-01-508-2868
NSN 5950-01-079-8626
NSN 5915-01-563-4161
NSN 7035-01-380-0547
NSN 5920-01-554-4932
NSN 5975-00-900-6083
NSN 5996-00-636-4849
NSN 4140-01-138-8635