Split Lock Washer Lock Washer Type Split Lock Finish Zinc Plated Material Spring Steel For Screw Size #10 Inside Diameter 0.2 in Outside Diameter 0.334 in Maximum Thickness 0.047 in Minimum Thickness 0.047 in Dimensional Standards ASME B18.21.1 Material Grade/Class Grade 2 Pack Size Small Pack Rockwell Hardness C38 System of Measurement Inch Thickness Tolerance 0.047 in to 0.062 in Package Quantity 100