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 5990-00-501-4994
NSN 5950-01-353-2704
NSN 6610-00-994-2170
NSN 5965-01-476-0721
NSN 2925-01-063-9532
NSN 5930-00-552-8384
NSN 5999-00-189-0772
NSN 5930-01-084-8176
NSN 6220-01-142-7161
NSN 5910-01-417-5997
NSN 5905-01-508-5120
NSN 6145-01-200-8643