Split Lock Washer Finish Black Oxide Material Steel For Screw Size 7/8 in Inside Diameter 0.878 in Outside Diameter 1.291 in Maximum Thickness 0.234 in Minimum Thickness 0.234 in Color Silver Dimensional Standards ASME B18.21.1 Inside Diameter Tolerance 0.878 in to 0.894 in Made in North America No Manufacturer Location Globally Sourced Material Grade/Class Grade 2 Maximum Temperature Not Applicable Minimum Temperature Not Applicable Outside Diameter Tolerance 1.291 in