<p>Oil Hard Flat Stock, Steel Material, Width 4 In., Thickness 5/8 In., Finish RMS 45 Max, Length 36 In., Length Tolerance +.250 In./.500 In., Hardness Scale 177 to 212 BHN, Grade O1, Standards UNS T31501, SAE J-437, ASTM A-681-07, FEDERAL QQT-570 REV C</p> <p><br /><b>Features</b></p> <ul> <li>Finish: RMS 45 Max</li> <li>Item: Oil Hard Flat Stock</li> <li>Length: 36&quot;</li> <li>Material: steel</li> <li>Width: 4&quot;</li> <li>Grade: O1</li> <li>Thickness: 5/8&quot;</li> <li>Standards: UNS T31501, SAE J-437, ASTM A-681-07, FEDERAL QQT-570 REV C</li> <li>Length Tolerance: +.250&quot;/.500&quot;</li> <li>Hardness Scale: 177 to 212 BHN</li> </ul> <p></p>