<p>Oil Hard Flat Stock, Steel Material, Width 1 In., Thickness 5/16 In., Finish RMS 45 Max, Length 18 In., Length Tolerance +.125 In./.250 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: 18&quot;</li> <li>Material: steel</li> <li>Width: 1&quot;</li> <li>Grade: O1</li> <li>Thickness: 5/16&quot;</li> <li>Standards: UNS T31501, SAE J-437, ASTM A-681-07, FEDERAL QQT-570 REV C</li> <li>Length Tolerance: +.125&quot;/.250&quot;</li> <li>Hardness Scale: 177 to 212 BHN</li> </ul> <p></p>