Wedge Lock Washer Lock Washer Type Wedge Lock Finish Plain Material Stainless Steel For Screw Size M12 Inside Diameter 13 mm Outside Diameter 19.5 mm Assembly Thickness 2 mm Assembly Thickness Tolerance +/-0.25 mm Dimensional Standards DIN 25201 Material Grade/Class 316 Pack Size Small Pack Rockwell Hardness HRC52 System of Measurement Metric Package Quantity 200