Thread Rolling Screw Finish Zinc Plated Material Steel Head Style Hex Washer Drive External Hex Thread Size M5-0.80 Fastener Length 20 mm Head Type Hex Washer Head and Washer Height 4.4 mm Drive Size 8 mm Dimensional Standards DIN 7500 System of Measurement Metric Head Height 4.4 mm Head Width 10.4 mm Package Quantity 250