M30-3.5 x 70mm ISO 4762 Hex Drive Class 12.9 Black Oxide Finish Alloy Steel Socket Cap Screw / THREAD DIRECTION: LEFT-HAND THREAD LENGTH: 70.00 MILLIMETERS NOMINAL HEAD DIAMETER: 44.610 MILLIMETERS MINIMUM AND 45.390 MILLIMETERS MAXIMUM HEAD HEIGHT: 29.480 MILLIMETERS MINIMUM AND 30.000 MILLIMETERS MAXIMUM INTERNAL DRIVE STYLE: D5 HEXAGON NOMINAL THREAD DIAMETER: 30.000 MILLIMETERS WIDTH ACROSS FLATS: 22.065 MILLIMETERS MINIMUM AND 22.275 MILLIMETERS MAXIMUM THREAD PITCH IN MILLIMETERS: 3.500 PART NAME ASSIGNED BY CONTROLLING AGENCY: SOCKET HEADCAP SCREW COLOR: BLACK OVERALL MATERIAL: STEEL OVERALL SURFACE TREATMENT: OXIDE OVERALL THREAD SERIES DESIGNATOR: M