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 5935-01-333-1241
NSN 5985-00-806-1961
NSN 5950-01-552-6952
NSN 6220-01-116-2411
NSN 5835-00-807-5632
NSN 5925-01-384-7883
NSN 5950-00-606-1314
NSN 6645-00-729-9900
NSN 5960-01-327-0334
NSN 5985-00-108-8481
NSN 6610-01-321-6904
NSN 5855-01-389-8884