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 6110-00-214-9186
NSN 6320-01-476-7702
NSN 5915-00-179-4623
NSN 5895-01-571-6825
NSN 6240-01-284-6482
NSN 5975-01-048-9301
NSN 6220-00-489-8571
NSN 7035-01-182-1086
NSN 5905-01-335-7051
NSN 5910-01-019-0353
NSN 5965-01-364-0122
NSN 4140-01-181-3213