M8-1.25 x 20mm Zinc Finish DIN 6921 Class 8.8 Hex Flange Bolt / THREAD DIRECTION: RIGHT-HAND THREAD LENGTH: 20.0 MILLIMETERS NOMINAL FASTENER LENGTH: 20.0 MILLIMETERS NOMINAL HEAD STYLE: C7 HEXAGON EXTENDED WASHER HEAD HEIGHT: 8.1 MILLIMETERS MAXIMUM WIDTH BETWEEN FLATS: 12.73 MILLIMETERS MINIMUM AND 13.00 MILLIMETERS MAXIMUM EXTENDED WASHER DIAMETER: 18.0 MILLIMETERS MAXIMUM EXTENDED WASHER THICKNESS: 4.9 MILLIMETERS NOMINAL END ITEM IDENTIFICATION: 6115-01-612-8573 NOMINAL THREAD DIAMETER: 8.0 MILLIMETERS THREAD PITCH IN MILLIMETERS: 1.25 MATERIAL: STEEL OVERALL THREAD SERIES DESIGNATOR: M