Supplier: Global T Trading (M) Sdn Bhd The hexagon head self-tapping screw is a fastener that’s designed to drill their own hole. The self-tapping screw is commonly used in the manufacturing and construction industry and provides excellent tensile strength. With its hex head, this allows the fastener to drive easily and not to slip out. With the use of a screwdriver and self-tapping screws, precise fitted threads are created. Self-tapping screws are ideal for items that require regular maintenance and works well for two different types of material being fastened together.