Hillman 240129 Carriage Bolt， 5/16 x 6-1/2-Inch， Steel， Zinc-Plated， Silver， 50-Pack<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Carriage Bolts are designed to fasten a wooden face to either wood or metal</li><li>Flat head provides a semi-flush finish to applications</li><li>The heads is designed to eliminate the need for a washer</li><li>Square underside of the head is self locking to eliminate the need for a driving tool</li><li>Zinc Finish provides a beautiful， consistent finish</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31tBzMVZ0QL.jpg" noproxy>