Feature●Price For: Each Thickness Tolerance: +/-0.030" System of Measurement: Inch Thickness: 1/4" Item: Square Washer Outside Dia.: 2" Rockwell Hardness: B49 Fits Bolt Sizes: 1/2" Material: Steel Inside Dia.: 9/16" Finish: Galvanized Country of Origin (subject to change): United StatesDescription Square Washer, System of Measurement Inch, Fits Bolt Sizes 1/2 In., Inside Dia. 9/16 In., Outside Dia. 2 In., Thickness 1/4 In., Material Steel, Finish Galvanized, Thickness Tolerance +/-0.030 In., Rockwell Hardness B49