The Hillman Group 290301 5/16-Inch Anti-Turn Washer， 50-Pack<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>The anti-turn washer prevents rotation</li><li>Specialty lock washer</li><li>Hot Dipped Galvanized Finish</li></ul></div><img src="http://ecx.images-amazon.com/images/I/51BkbKNldGL.jpg" noproxy>