Split Lock Washer Lock Washer Type Split Lock Finish Black Oxide Material Steel For Screw Size 7/8 in Inside Diameter 0.878 in Outside Diameter 1.459 in Maximum Thickness 0.219 in Minimum Thickness 0.219 in Color Black 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