Split Lock Washer Lock Washer Type Split Lock Finish Zinc Yellow Material Steel For Screw Size 1 3/8 in Inside Diameter 1.379 in Outside Diameter 2.219 in Maximum Thickness 0.344 in Minimum Thickness 0.344 in Dimensional Standards ASME B18.21.1 Material Grade/Class Not Graded Pack Size Small Pack Rockwell Hardness C40 to C50 Package Quantity 5