Patent ID: 8429875

Claim:
A protruding-head fastener for joining two or more members, the fastener comprising: a head that protrudes when the fastener is installed and shaped to rotationally couple with a drive tool, wherein the protruding head comprises a top chamfered portion and two external portions, the two external portions being non-circular when viewed along the longitudinal axis, shaped to rotationally couple with a drive tool, and separated by a recessed external portion that is recessed relative to the non-circular external portions, such that, when a tool is coupled with the head at an angle to a longitudinal axis of the fastener, one side of the tool extends into the recessed external portion and an opposite side of the tool fits against the chamfered portion; and a shank fixedly coupled with the protruding head and having a self-tapping threaded portion and a maximum diameter, the protruding head and the shank defining the longitudinal axis through the fastener, the protruding head having a length along the longitudinal axis and a maximum width transverse to the longitudinal axis, the length divided by the maximum width defining an aspect ratio for the protruding head that is equal to or greater than 1.0, the protruding head further having a minimum width that is greater than the maximum diameter of the shank.