Miniature Thread Rolling Screw Finish Zinc Plated Material Steel Head Style Pan Drive Torx Thread Size M1.6-0.79 Fastener Length 4 mm Head Type Pan Head and Washer Height 0.1 mm Drive Size T4 Dimensional Standards ASME B18.6.3 SAE J933 System of Measurement Metric Head Height 0.1 mm Head Width 3 mm Package Quantity 25