Fastener

A method of installing a fastener into a receiving structure, the method comprising the steps of:

• providing a fastener, the fastener including:
• an elongate fastener body, having longitudinally spaced fastener head and fastener tip ends, the fastener body defining a longitudinal axis, two elongate flat faces, each flat face extending substantially parallel to, and laterally spaced from, the longitudinal axis, the two flat faces being located laterally opposite one another on the fastener body, and
• two elongate undulate faces, each undulate face having a plurality of longitudinally spaced teeth arranged thereupon, each undulate face extending substantially parallel to, and laterally spaced from, the longitudinal axis, the two undulate faces being located laterally opposite one another on the fastener body, and the two undulate faces being laterally separated from one another by interposed flat faces, wherein a fastener perimeter is defined in a lateral plane by the two flat faces and the two undulate faces, the fastener perimeter entirely laterally surrounding the longitudinal axis;
• providing a longitudinally oriented receiving aperture in the receiving structure;
• inserting the fastener tip end into the receiving aperture;
• penetrating the receiving aperture with the fastener body to a predetermined depth;
• maintaining the fastener in the receiving aperture in a first alignment;
• rotating the fastener about the longitudinal axis within the receiving aperture into a second alignment;
• driving at least one tooth laterally into the receiving structure from the receiving aperture due to rotation of the fastener into the second alignment;
• and
• with the at least one tooth driven laterally into the substrate, maintaining the fastener in the receiving aperture in the second alignment to resist longitudinal movement of the fastener with respect to the receiving aperture.