Split Lock Washer Finish Zinc Plated Material Steel For Screw Size 7/8 in Inside Diameter 0.878 in Outside Diameter 1.489 in Maximum Thickness 0.266 in Minimum Thickness 0.266 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 Minimum Temperature 10 Degrees F