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 5915-01-183-0078
NSN 6240-00-488-0278
NSN 6135-01-299-0778
NSN 5905-00-319-4689
NSN 5930-00-010-8134
NSN 6145-01-496-5222
NSN 7035-01-118-5861
NSN 6220-01-381-1793
NSN 6685-01-025-3418
NSN 5990-01-633-9503
NSN 5835-01-495-5986
NSN 5975-01-410-7647