M6-1.0 x 30mm ISO 4762 Hex Drive Class 12.9 Black Oxide Finish Alloy Steel Socket Cap Screw / THREAD LENGTH: 30.0 MILLIMETERS NOMINAL HEAD STYLE: C1 HEXAGON INTERNAL DRIVE STYLE: D5 HEXAGON PART NAME ASSIGNED BY CONTROLLING AGENCY: SCREW,CAP,SOCKET HEAD MATERIAL: STEEL OVERALL THREAD SERIES DESIGNATOR: M