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 7035-01-246-3086
NSN 5855-00-403-1031
NSN 4140-00-575-6586
NSN 6220-01-324-7046
NSN 5895-00-389-7171
NSN 5930-00-122-9337
NSN 6130-00-935-5589
NSN 6610-00-518-4919
NSN 6645-01-370-4259
NSN 6620-00-864-8153
NSN 5965-01-129-1968
NSN 6650-00-539-7298