<p>Square Washer, System of Measurement Inch, Fits Bolt Sizes 3/4 In., Inside Dia. 13/16 In., Outside Dia. 4 In., Thickness 1/4 In., Material Steel, Finish Galvanized, Thickness Tolerance +/-.031, Rockwell Hardness B40</p> <p><br /><b>Features</b></p> <ul> <li>Finish: Galvanized</li> <li>Inside Dia.: 13/16&quot;</li> <li>Item: Square Washer</li> <li>Material: steel</li> <li>Outside Dia.: 4&quot;</li> <li>Fits Bolt Sizes: 3/4&quot;</li> <li>Thickness: 1/4&quot;</li> <li>Rockwell Hardness: B40</li> <li>Thickness Tolerance: +/-.031</li> <li>System of Measurement: Inch</li> </ul> <p></p>