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 7035-00-890-7649
NSN 5935-00-753-5101
NSN 6650-00-463-1514
NSN 6135-01-127-0173
NSN 5960-01-274-7628
NSN 6240-01-047-4085
NSN 6240-00-548-3992
NSN 6685-01-398-1097
NSN 6135-01-652-9622
NSN 6220-00-113-8617
NSN 7035-01-048-7122
NSN 6145-01-389-2357