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 5975-00-454-5884
NSN 6685-01-437-9113
NSN 6110-00-081-0927
NSN 5950-01-113-8858
NSN 5935-01-350-4518
NSN 5930-01-465-1056
NSN 6110-01-389-3191
NSN 6645-01-519-2220
NSN 5895-00-617-6340
NSN 5990-00-076-9839
NSN 6620-01-282-6392
NSN 6240-01-242-9138