Self-Drilling Screw
Self drilling screws are fasteners with a drill point that allows them to drill their own pilot hole and then form or engage threads as they are driven. They are commonly used to fasten metal to metal or metal to wood in applications like HVAC, metal roofing and siding, steel framing, and equipment enclosures. Because the drill tip creates the hole during installation, self drilling screws can reduce steps and speed up assembly compared to using a separate drill bit.
Self drilling screws are selected based on drill point style and capacity, which indicates the thickness of material they can penetrate. Proper installation involves using the right driver speed and steady pressure so the drill point cuts cleanly before the threads engage. Choosing the correct screw material and coating is also important for corrosion resistance, especially in outdoor or roof applications, and using the right washer or sealing head helps prevent leaks when fastening panels.