Socket Head Cap Screw Head Type Standard System of Measurement Metric Drive Type Socket Drive Size 6 mm Material Steel Finish Blue Phosphate Thread Size M8-1.25 Minimum Thread Length 33 mm Fastener Length 40 mm Head Height 8 mm Head Diameter 13 mm Pack Size Small Pack Thread Style Partially Threaded Special Features Not Applicable Countersink Angle Not Applicable Dimensional Standards ASME B18.3 Flange Diameter Not Applicable Flange Thickness Not Applicable