Patent 6974289 was granted and assigned to Illinois Tool Works on December, 2005 by the United States Patent and Trademark Office.
A male threaded fastening member is provided with depressions in at least one or several helix wraps of the thread adjacent the head, the depressions extending inwardly from an edge of the thread at least part way toward a shank of the male fastening member. In a fastening system including the male fastening member, a female member includes projections for engaging the depressions.