Drill and thread forming screw

摘要

A drilling and thread forming screw including a shank portion with a head at one end and a drill point at the other end. The shank includes a threaded portion having a minor diameter and a major diameter. The drill point defines a segment of a cone having a base and a point. The base intersects the shank at the minor diameter of the shank. This screw is adapted to drill into a substrate up to the minor diameter of the shank and then to form female threads in the substrate.