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 6320-01-624-0193
NSN 6220-00-403-7550
NSN 5905-01-620-8172
NSN 5950-00-539-9877
NSN 5975-00-433-1034
NSN 5905-00-586-3561
NSN 6650-01-310-3437
NSN 5960-00-194-1488
NSN 6320-01-583-6809
NSN 6320-01-325-1487
NSN 5920-01-217-8379
NSN 5915-01-500-4012