Split Lock Washer Lock Washer Type Split Lock Finish Hot Dipped Galvanized Material Steel For Screw Size 1 3/4 in Inside Diameter 1.758 in Outside Diameter 2.679 in Maximum Thickness 0.389 in Minimum Thickness 0.389 in Dimensional Standards ASME B18.21.1 Material Grade/Class Not Graded Pack Size Small Pack Rockwell Hardness C40 to C50 Package Quantity 5