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 6650-00-862-2142
NSN 6610-01-388-6661
NSN 6220-01-355-8929
NSN 6685-00-162-2052
NSN 5996-01-371-6804
NSN 5985-01-557-5371
NSN 4140-01-462-0268
NSN 5985-01-068-4667
NSN 6220-00-133-7904
NSN 6610-00-451-3325
NSN 5985-01-443-9249
NSN 6620-01-557-1941