Self Drilling Screws

Recent developments in the field of cladding fasteners have promoted usage of self-drilling screws designed to provide exceptional corrosion resistance and weather proofing.
These screws confirm to international standards such as DIN, ASTM, AS and as the name implies, they are directly screwed through sheets onto the purlin with the help of a drill machine. Identification of these screws is depicted below.( Figure - 10)