A self-drilling screw is a type of self-tapping screw that also features a drill point. self-drilling screws have a point that acts as a drill bit and sharp cutting threads that tap the hole during installation. Self-drilling screws are a commonly used variety of screws for quick drilling into both metal and wood. A self-drilling screw can typically be identified by its point and flute (notch) tip. Self-drilling screws do not require a pilot hole, which accelerates installation time and lowers the cost and need for additional drill bits. This cost-saving feature makes self-drilling screws the clear choice for metal building construction. These screws rarely require lock washers or other types of locking fasteners to prevent loosening.
