M6 x 12mm OD DIN 125 Low Carbon Zinc Finish Steel Type A General Purpose Flat Washer / CROSS-SECTIONAL SHAPE STYLE: 1 RECTANGULAR HOLE DIAMETER: 6.4 MILLIMETERS MINIMUM AND 6.6 MILLIMETERS MAXIMUM PERIPHERAL SHAPE STYLE: 1 ROUND CENTER HOLE SHAPE STYLE: 1 ROUND THICKNESS: 1.4 MILLIMETERS MINIMUM AND 1.8 MILLIMETERS MAXIMUM OVERALL DIAMETER: 11.5 MILLIMETERS MINIMUM AND 12.5 MILLIMETERS MAXIMUM END ITEM IDENTIFICATION: TOW TRACTOR, AIRCRAFT MATERIAL: STEEL OVERALL SURFACE TREATMENT: ZINC OVERALL