Split Lock Washer Extra Duty Steel Finish Plain Fits Bolt Sizes 1 1/8 In Inside Dia 1.129 In Outside Dia 2.013 In Thickness 0.375 In Thickness Tolerance +0.020 In Color Black Rockwell Hardness C38-46 N/A Meets/Exceeds ASME B18.21.1 Package Quantity 10