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 5975-01-562-6109
NSN 6240-01-449-1387
NSN 5996-01-507-6746
NSN 4140-00-329-3854
NSN 6610-01-284-0009
NSN 6135-00-643-3561
NSN 5835-01-277-0710
NSN 6320-01-449-1014
NSN 6620-00-075-6667
NSN 5905-01-121-7799
NSN 6685-01-023-2166
NSN 6240-00-737-2775