Split Lock Washer Lock Washer Type Split Lock Finish Plain Material Silicon Bronze For Screw Size 3/4 in Inside Diameter 0.766 in Outside Diameter 1.265 in Maximum Thickness 0.188 in Minimum Thickness 0.188 in Color Bronze Dimensional Standards ASME B18.21.1 Material Grade/Class Not Graded Pack Size Small Pack Rockwell Hardness B90 Thickness Tolerance 0.188 in Package Quantity 10