Split Lock Washer Lock Washer Type Split Lock Finish Zinc Plated Material Steel For Screw Size #4 Inside Diameter 0.114 in Outside Diameter 0.209 in Maximum Thickness 0.025 in Minimum Thickness 0.025 in Color Silver Dimensional Standards ASME B18.21.1 Inside Diameter Tolerance +/-0.005 in Made in North America No Manufacturer Location Globally Sourced Material Grade/Class Not Graded Material Quality Standards ASTM A307A SAE J429 Maximum Temperature 275 Degrees F