Split Lock Washer, Lock Washer Type Split Lock, Finish NL-19, Material Stainless Steel, For Screw Size M10, Inside Diameter 10.2 mm, Outside Diameter 18.1 mm, Maximum Thickness 2.2 mm, Minimum Thickness 2.2 mm, Color Silver, Dimensional Standards ANSI B18.21.1, Material Grade/Class 18-8, Pack Size Small Pack, Resistance Properties , Rockwell Hardness C35, System of Measurement Metric, Thickness Tolerance +/-0.2 mm, Package Quantity 50