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 5910-01-203-9368
NSN 5990-00-323-8856
NSN 5930-00-700-9190
NSN 6105-01-596-6541
NSN 5835-00-368-4182
NSN 6240-01-081-3190
NSN 5925-01-174-0335
NSN 6685-00-165-5893
NSN 5835-01-659-1364
NSN 6320-01-089-9086
NSN 7035-00-369-6346
NSN 6650-00-480-9135