Split Lock Washer Lock Washer Type Split Lock Finish Zinc Plated Material Steel For Screw Size 1 1/4 in Inside Diameter 1.254 in Outside Diameter 2.036 in Maximum Thickness 0.312 in Minimum Thickness 0.312 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