M37020.070.0001 Split Lock Washer, Lock Washer Type Split Lock, Finish Zinc Plated, Material Steel, For Screw Size M7, Inside Diameter 7.1 mm, Outside Diameter 12.8 mm, Maximum Thickness 1.6 mm, Minimum Thickness 1.6 mm, Dimensional Standards DIN 127 B, Material Grade/Class Not Graded, Pack Size Small Pack, Rockwell Hardness C38, Package Quantity 100