SAE Washer Flat Washer Type SAE Dimensional Standards ASME B18.22.1 Material Steel Material Grade/Class Grade 8 Finish Zinc Yellow For Screw Size 1/2 in Inside Diameter 1.219 in Outside Diameter 1 1/16 in Maximum Thickness 0.097 in System of Measurement Inch Minimum Thickness 0.121 in Color Yellow Material Quality Standards ASTM F436 Pack Size Bulk Pack Rockwell Hardness C38 Package Quantity 2500