Hardened Steel Washer Flat Washer Type Standard Material Steel Material Grade/Class Grade 8 Finish Hot Dipped Galvanized For Screw Size 1 1/8 in Inside Diameter 1.125 in Outside Diameter 2 1/4 in Maximum Thickness 0.136 in System of Measurement Inch Minimum Thickness 0.177 in Material Quality Standards ASTM F436 Pack Size Small Pack Package Quantity 5