Split Lock Washer Finish Zinc Plated Material Steel For Screw Size 7/8 in Inside Diameter 0.878 in Outside Diameter 1.571 in Maximum Thickness 0.285 in Minimum Thickness 0.285 in Dimensional Standards ASME B18.21.1 Material Grade/Class Not Graded Pack Size Small Pack Rockwell Hardness C38 Package Quantity 5