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 6240-01-305-0908
NSN 5895-01-143-8620
NSN 5930-01-302-0108
NSN 6650-01-136-8578
NSN 6220-01-181-3135
NSN 5910-01-449-1055
NSN 6685-01-309-2308
NSN 5945-01-582-7066
NSN 6650-00-448-8290
NSN 6650-01-291-0915
NSN 5990-00-362-1453
NSN 5855-00-221-9435