Split Lock Washer, Lock Washer Type Split Lock, Finish NL-19, Material Stainless Steel, For Screw Size M3, Inside Diameter 3.1 mm, Outside Diameter 6.2 mm, Maximum Thickness 0.8 mm, Minimum Thickness 0.8 mm, Color Silver, Dimensional Standards ANSI B18.21.1, Material Grade/Class 316, Pack Size Small Pack, Rockwell Hardness C35, System of Measurement Metric, Thickness Tolerance +/-0.2 mm, Package Quantity 100