Thumb Screw, Finish Plain, Material Stainless Steel, Thread Size M4x0.70, Fastener Length 20 mm, Head Width 17.6 mm, Head Height 8.6 mm, Head Type Wing, Maximum Head Width 17.6 mm, Minimum Head Width Not Applicable, Maximum Head Height 8.6 mm, Minimum Head Height Not Applicable, System of Measurement Metric, Dimensional Standards DIN 316, Head Shape Rounded Wing