Socket Head Cap Screw Head Type Standard System of Measurement Metric Drive Type Socket Drive Size 1.5 mm Material Steel Material Grade/Class Class 12.9 Finish Black Oxide Thread Size M1.6-0.35 Minimum Thread Length 4 mm Fastener Length 4 mm Head Height 1.6 mm Head Diameter 3 mm Pack Size Small Pack Thread Style Fully Threaded Special Features Not Applicable Countersink Angle Not Applicable Dimensional Standards DIN 912 Flange Diameter Not Applicable