Patent ID: 9016995
Filing Date: 2015-04-28
Classification: F16B

Abstract:
1. A fastener comprising: a cylindrical shaft having a longitudinal axis; a screw head located at an uppermost portion of the cylindrical shaft, the screw head being configured to mate with a tool configured to rotate the fastener and force the fastener into a receiving material; a cylindrical portion located on the cylindrical shaft axially lower than the screw head; a tapered portion located on the cylindrical shaft axially lower than the cylindrical portion, the tapered portion being tapered from a first diameter to a larger second diameter that is equal to or larger than a diameter or a maximum width of the screw head; a threaded portion located on the cylindrical shaft axially lower than the tapered portion and comprising a plurality of external threads; and a cutting section located along an axial length of the tapered portion from the first diameter through the second diameter and extending at least partially into the cylindrical portion, the cutting section configured to form a countersink hole having a diameter equal to or greater than the diameter or the maximum width of the screw head, wherein the cylindrical portion has a diameter equal to the second diameter, the first diameter being equal to a diameter of the threaded portion, wherein the cutting section forms a countersink hole in the receiving material as the fastener is rotated and forced into the receiving material such that the screw head is located below a surface of the receiving material adjacent the countersink hole.