Split Lock Washer Finish Zinc Plated Material Steel For Screw Size 3/4 in Inside Diameter 0.753 in Outside Diameter 1.355 in Maximum Thickness 0.241 in Minimum Thickness 0.241 in Dimensional Standards ASME B18.21.1 Material Grade/Class Not Graded Pack Size Small Pack Rockwell Hardness C38 Package Quantity 10