Socket Head Cap Screw, Head Type Low-Profile Standard, System of Measurement Metric, Drive Type Socket, Drive Size 4 mm, Material Steel, Material Grade/Class Class 8.8, Finish Black Oxide, Thread Size M5-0.8, Minimum Thread Length 18 mm, Fastener Length 18 mm, Head Height 3.5 mm, Head Diameter 8.5 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