Socket Head Cap Screw, Head Type Low-Profile Standard, System of Measurement Metric, Drive Type Socket, Drive Size 17 mm, Material Steel, Material Grade/Class Class 8, Finish Plain, Thread Size M20-2.5, Minimum Thread Length 30 mm, Fastener Length 30 mm, Head Height 11 mm, Head Diameter 30 mm, Pack Size Small Pack, Thread Style Fully Threaded, Special Features Not Applicable, Countersink Angle Not Applicable, Dimensional Standards DIN 7984, Flange Diameter Not Applicable