Patent ID: 7318256

Claim:
A fastener having an insertion axis, the fastener being configured to be inserted into an aperture in a structure along the insertion axis, the fastener comprising: a flange; a body coupled to the flange, the body having a pair of generally U-shaped portions, each of which being disposed on an opposite side of the insertion axis; a wing member coupled to each of the generally U-shaped portions, each wing member having a warped planar shape with a first end that is coupled to an associated one of the generally U-shaped portions and a second free end opposite the first end, the second end terminating at a distal edge surface, the distal edge surface being sloped relative to the flange in a vertical direction that is generally parallel to the insertion axis so that a first lateral side of the distal edge surface is relatively closer to the flange in a vertical direction than a second opposite lateral side of the distal edge surface; and wherein the distal edge surface extends in a helical manner between the first and second lateral sides.