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 6685-00-431-9608
NSN 6685-01-547-9313
NSN 5950-00-494-1821
NSN 6105-01-486-2079
NSN 5905-01-528-7351
NSN 5835-00-927-6013
NSN 5965-01-467-2071
NSN 5945-01-149-0821
NSN 6150-01-255-0259
NSN 5895-00-665-3991
NSN 5985-01-396-5444
NSN 6610-01-067-6591