Self Drilling Screws – Screws with a drill point for self drilling into steel of varying thicknesses.
Often referred to as Tek screws they are available in various head styles such as countersunk, hexagon head, pan head and wafer head etc.
The self drilling screws vary in drill point types which relates to the material they are fixing to. If the tip is smaller and the thread is coarse this is normally for up to 3mm material. With a long drill tip and fine thread it is generaly used on thicker steels from 5mm to 12mm or even 20mm with double drill point versions.