Socket Head Cap Screw, Head Type Standard, System of Measurement Metric, Drive Type Socket, Drive Size 27 mm, Material Steel, Material Grade/Class Class 12.9, Finish Black Oxide, Thread Size M39-4, Minimum Thread Length 90 mm, Fastener Length 90 mm, Head Height 39 mm, Head Diameter 58 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