M12-1.75 x 30mm ISO 4762 Hex Drive Class 12.9 Black Oxide Finish Alloy Steel Socket Cap Screw / THREAD DIRECTION: RIGHT-HAND THREAD LENGTH: 26.5 MILLIMETERS MINIMUM AND 30.0 MILLIMETERS MAXIMUM FASTENER LENGTH: 30.0 MILLIMETERS NOMINAL HEAD STYLE: C49 FLAT CHAMFER HEAD DIAMETER: 18.0 MILLIMETERS MAXIMUM HEAD HEIGHT: 12.0 MILLIMETERS NOMINAL INTERNAL DRIVE STYLE: D5 HEXAGON NOMINAL THREAD DIAMETER: 12.0 MILLIMETERS WIDTH ACROSS FLATS: 10.0 MILLIMETERS NOMINAL THREAD PITCH IN MILLIMETERS: 1.75 EXTERNAL THREAD TOLERANCE CLASS: 6G MATERIAL: STEEL PROPERTY CLASS 12.9 OVERALL THREAD SERIES DESIGNATOR: M