Hexwasher Head Tapping Screws are self-tapping screws designed for use directly in sheetmetal or plastic or with spring nuts. They are used in automotive applications for securing a wide range of parts. They feature a hexagonal head and built-in washer. Hexwasher head tapping screws provide a large bearijng surface, and strong, reliable, vibration resistant fastening in vehicles. Finish: Phosphate & Oil.