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 7035-01-115-8996
NSN 6135-00-134-6648
NSN 6110-00-171-2214
NSN 5985-00-488-2520
NSN 6610-01-457-1974
NSN 5950-01-586-9013
NSN 6145-01-124-0035
NSN 6220-01-555-8332
NSN 6135-01-236-8603
NSN 5930-00-134-8876
NSN 5920-00-100-1294
NSN 5999-01-130-1585