<p>Lock Washer, Internal Tooth, Heavy Duty, Steel, Finish Plain, Fits Bolt Sizes 1/4 In, Inside Dia. 0.256 In, Outside Dia. 0.536 In, Thickness 0.039 In, Thickness Tolerance 0.045 to 0.035 In, Color Black, Rockwell Hardness C38-46, N/A, Meets/Exceeds ASME B18.21.1, Package Quantity 100</p> <p><br /><b>Features</b></p> <ul> <li>Color: Black</li> <li>Finish: Plain</li> <li>Inside Dia.: 0.256&quot;</li> <li>Item: Lock Washer</li> <li>Material: steel</li> <li>Outside Dia.: 0.536&quot;</li> <li>Type: Internal Tooth, Heavy Duty</li> <li>Fits Bolt Sizes: 1/4&quot;</li> <li>Thickness: 0.039&quot;</li> <li>Meets/Exceeds: ASME B18.21.1</li> <li>Rockwell Hardness: C38 to C46</li> <li>Thickness Tolerance: 0.045 to 0.035&quot;</li> </ul> <p></p>