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 5935-01-554-9997
NSN 6110-00-902-9835
NSN 6150-00-642-2138
NSN 5975-00-630-4741
NSN 5985-01-138-4330
NSN 5965-01-130-1965
NSN 6320-01-618-7800
NSN 5996-01-501-7645
NSN 5999-00-277-4257
NSN 5975-01-192-5204
NSN 5905-01-549-9233
NSN 6150-00-811-4540