Socket Flat Head Screw Head Type Flat System of Measurement Metric Drive Type Socket Drive Size 12 mm Material Steel Material Grade/Class Class 10.9 Finish Black Oxide Thread Size M18-2.5 Minimum Thread Length 60 mm Fastener Length 70 mm Head Height 8 mm Head Diameter 33 mm Pack Size Small Pack Thread Style Partially Threaded Special Features Not Applicable Countersink Angle 90 Degrees Dimensional Standards ISO 10642 Flange Diameter Not Applicable