<p>Carriage Bolt,Neck Type Square Neck,Grade 5,Material Steel,Zinc Plated Finish,Thread Size 5/16-18,Length 4 In.,Drill Size 5/16 In.,Head Dia. 0.688 In. to 0.719 In.,Head Height 0.156 In. to 0.176 In.,Head Type Round,Square Height 0.156 In. to 0.187 In.,Square Width 0.307 In. to 0.324 In.,Meets/Exceeds ASME B18.5,Package Quantity 50</p> <p><br /><b>Features</b></p> <ul> <li>Finish: zinc plated</li> <li>Item: Carriage Bolt</li> <li>Length: 4&quot;</li> <li>Material: steel</li> <li>Thread Size: 5/16&quot;-18</li> <li>Drill Size: 5/16&quot;</li> <li>Grade: 5</li> <li>Head Type: Round</li> <li>Meets/Exceeds: ASME B18.5</li> <li>Head Dia.: 0.688&quot; to 0.719&quot;</li> <li>Head Height: 0.156&quot; to 0.176&quot;</li> <li>Square Height: 0.156&quot; to 0.187&quot;</li> <li>Square Width: 0.307&quot; to 0.324&quot;</li> <li>Neck Type: Square</li> </ul> <p></p>