Patent ID: 8070404

Claim:
A fastener assembly for securing two or more structures and providing electrical grounding to the secured structures after attachment, the fastener assembly comprising: a fastener with a head having a first surface for engagement by a fastening tool, second surface on the opposite side of the head from the first surface, and a shaft extending outward from the second surface of the head; and an annular electrically conductive washer rotatably disposed about the shaft and rotatable relative to the second surface of the fastener head, the washer having an inner diameter, an outer diameter, a first surface and a second surface located on the opposite side of the washer from the first surface, the first surface being positioned adjacent to the second surface of the head, the combination of the first surface of the washer and the second surface of the head providing a low friction interface so that the head can rotate relative to the washer, and approximately six substantially identical pointed projections extending out from the second surface of the washer and formed integrally therewith, the pointed projections adapted to penetrate into the structure being secured; wherein the projections are conically shaped and substantially equally spaced about the washer at a common radius so that the pointed projections lie substantially on a medial circumference.