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 2925-01-531-1202
NSN 5985-00-155-8754
NSN 5998-00-409-0043
NSN 5835-01-323-2581
NSN 6610-00-920-4674
NSN 5855-01-020-7982
NSN 5996-00-443-5851
NSN 6110-01-060-6439
NSN 4140-00-936-5636
NSN 5950-01-149-1417
NSN 6645-00-536-1555
NSN 5855-01-479-3152