Thread-Forming Screw, Finish Zinc-Plated, Material Steel, Head Style Hex Washer, Drive External Hex, Thread Size M5x0.80, Fastener Length 20 mm, Head Type Hex Washer, Head and Washer Height 4.4 mm, Drive Size 8 mm, Dimensional Standards DIN 7500, Maximum Head Width 10.4 mm, Minimum Head Width Not Applicable, Maximum Head Height 4.4 mm, Minimum Head Height Not Applicable, System of Measurement Metric, Head Height 4.4 mm, Head Width 10.4 mm, Package Quantity 250