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 5950-00-952-5201
NSN 5910-00-836-3476
NSN 5999-01-227-1615
NSN 6645-01-494-3845
NSN 7035-01-551-5533
NSN 6240-01-380-9014
NSN 5925-01-596-8118
NSN 6320-00-098-2858
NSN 6220-01-010-1452
NSN 6240-00-976-4435
NSN 5920-01-076-2679
NSN 6320-01-272-7072