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 5920-00-646-5430
NSN 5965-01-271-0808
NSN 5960-00-361-8409
NSN 5935-00-348-2923
NSN 6320-00-731-6134
NSN 6650-01-423-1348
NSN 4140-00-728-8117
NSN 6220-00-171-8638
NSN 5905-00-844-3212
NSN 6105-01-634-0322
NSN 2925-01-197-7864
NSN 5965-01-450-2187