Split Lock Washer Lock Washer Type Split Lock Finish Hot Dipped Galvanized Material Steel For Screw Size 2 1/2 in Inside Diameter 2.512 in Outside Diameter 3.471 in Maximum Thickness 0.44 in Minimum Thickness 0.44 in Dimensional Standards ASME B18.21.1 Material Grade/Class Not Graded Pack Size Small Pack Rockwell Hardness C40 to C50 Package Quantity 5