<p>Lock Washer, Steel, Delta Protect Finish, Fits Bolt Sizes 1/2", Inside Dia. 0.530", Outside Dia. 1.000", Thickness 0.130", Thickness Tolerance +/- 0.01", Rockwell Hardness Min. 46 HRC, Meets/Exceeds DIN 25201, Package Quantity 100</p> <p><br /><b>Features</b></p> <ul> <li>Finish: Delta Protect</li> <li>Inside Dia.: 0.530"</li> <li>Material: steel</li> <li>Outside Dia.: 1.000"</li> <li>Size: 1/2"</li> <li>Fits Bolt Sizes: 1/2"</li> <li>Thickness: 0.130"</li> <li>Meets/Exceeds: DIN 25201</li> <li>Rockwell Hardness: Min. 46 HRC</li> <li>Thickness Tolerance: +/- 0.01"</li> </ul> <p></p>