Split Lock Washer Lock Washer Type Split Lock Finish Plain Material Stainless Steel For Screw Size 9/16 in Inside Diameter 0.564 in Outside Diameter 0.965 in Maximum Thickness 0.141 in Minimum Thickness 0.141 in Dimensional Standards ASME B18.21.1 Material Grade/Class 18-8 Pack Size Small Pack Rockwell Hardness C35 Package Quantity 10