GRK 772691102232 RSS Bulk 5/16-Inch by 3-1/2-Inch Screw<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Built-in washer head</li><li>Climatek coated and hardened steel</li><li>ICC report ESR-2442</li><li>Uses GRK bit T-30</li><li>Self-tapping</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31jkEJo5AaL.jpg" noproxy>