Question: what is the difference between self drilling and self tapping screws?
Answer: A Self-Tapping Screw can be referred to as simply a Tapping Screw. However it is also often called a Sheet Metal Screw because they are primarily used in sheet metal. ... A Self-Drilling Screw is a Self-Tapping Screw with the added feature of a drill point. The drill point looks a lot like the point of a drill.