Flat Washer, Flat Washer Type Standard, Dimensional Standards DIN 125A, DIN 6916, Material Steel, Material Grade/Class Grade 8, Finish Zinc Yellow, For Screw Size M30, Inside Diameter 31 mm, Outside Diameter 56 mm, Maximum Thickness 5 mm, System of Measurement Metric, Minimum Thickness 5 mm, Color Yellow, Pack Size Small Pack, Thickness Tolerance +/-0.60mm, Package Quantity 10