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A self-tapping screw is designed to create its own hole in wood, plastic or metal materials as it is being driven (it does not necessarily require a pilot hole). Tapping screws are beneficial in applications that involve consistent maintenance and are especially helpful when two different materials are being attached together. This tapping screw features a washer head to distribute pressure, reducing the risk of crushing material around the hole. Available through your local City Electric Supply. Click here to find a branch near you. Learn More