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 6130-00-387-2051
NSN 6320-01-243-2276
NSN 5925-00-021-8344
NSN 5905-01-392-8305
NSN 2925-01-197-7864
NSN 6135-00-932-3136
NSN 5920-00-187-0260
NSN 6240-01-093-7949
NSN 5999-01-465-4465
NSN 6645-00-494-3065
NSN 6150-00-189-0292
NSN 4140-01-462-5901