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 5996-01-100-4361
NSN 5855-00-057-6900
NSN 5905-01-479-8811
NSN 2925-00-928-5931
NSN 6685-01-185-3968
NSN 5835-01-020-2262
NSN 5998-00-954-0111
NSN 5999-01-298-2594
NSN 5895-01-540-6448
NSN 6645-00-042-9587
NSN 5965-01-592-3051
NSN 2925-01-331-5039