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 5905-00-354-1777
NSN 6645-00-658-7838
NSN 6240-01-509-1905
NSN 6220-01-020-8703
NSN 5930-00-097-7770
NSN 5975-01-498-3872
NSN 6105-01-023-0323
NSN 6150-01-360-9870
NSN 6620-01-032-3937
NSN 5925-01-520-5811
NSN 6610-01-447-2560
NSN 5835-00-474-6085