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 5985-01-112-9502
NSN 4140-01-006-0957
NSN 5950-01-154-9120
NSN 5965-00-387-6880
NSN 6130-01-160-4408
NSN 6240-01-514-4184
NSN 7035-00-679-9027
NSN 6645-00-057-3499
NSN 6130-01-167-2990
NSN 6105-00-189-1750
NSN 6220-00-174-5876
NSN 5835-00-284-0882