Countersunk Head Self Drilling Screw enable drilling without first creating a pilot hole. These screws are usually used to join materials like sheet metal.There are two distinct types of metal used in different parts of the fastener. Usually one type of metal is used for the head and shaft, while a harder metal is used at the point or drilling tip.The most common material used in these screws, is predominantly iron mixed with carbon. It offers the highest strength compared to other metals and elements.
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