M8-1.25 x 50mm Zinc Finish DIN 6921 Class 10.9 Hex Flange Bolt / THREAD DIRECTION: RIGHT-HAND HEAD STYLE: C1 HEXAGON WIDTH BETWEEN FLATS: 13.0 MILLIMETERS NOMINAL NOMINAL THREAD DIAMETER: 1.25 INCHES PART NAME ASSIGNED BY CONTROLLING AGENCY: METRIC HEX FLANGE BOLT MATERIAL: STEEL OVERALL SURFACE TREATMENT: ZINC OVERALL THREAD SERIES DESIGNATOR: UNC