screw head notch, method of manufacturing a punch for forming a notch in a screw head and punch for forming a notch in a screw head

摘要

NUT FORM IN A SCREW HEAD, METHOD OF MANUFACTURING A DRILL FOR FORMING A NUT IN A SCREW HEAD AND FORM FOR NUT IN A SCREW HEAD. The screw (10) of this order is designed to facilitate the insertion of rotary drive power tools into the notch (18) of the screw (10). The notches (18) of this screw (10) generally utilize spiral-shaped drive surfaces and are formed in a mandrel (2) on the upper surface of the screw (10). The transmission lobes have upper surfaces which are dug a distance into the mandrel (2). An inclined surface is formed on the upper surfaces which cause a pivot point to fall into the notch (18) in a nested manner. The inclined surfaces are constructed with both removal (5) and installation (6) inclined parts.