SCREW FASTENER AND DRIVER TOOL THEREFORE

摘要

A screw fastener having a head with a peripheral surface configured to apply a driving torque to the head by an external driver tool, the head including an axially-directed hole for receiving an axially-directed pin of the driver tool whereby engagement of the pin within the hole acts to maintain the driver tool engagement with the screw head during driving of the screw. The invention is particularly applicable to screw fasteners with a low profile head as may be used for fixing steel frame and other components in building construction, the drive system providing for more reliable engagement between the driver tool and the head of low profile.