The Hillman Group 671 Left HD Nut， 9/16-12-Inch， 4-Pack<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>They are also known as reverse threaded nuts</li><li>Cannot be used with right-hand threaded fasteners</li><li>Zinc finish</li></ul></div><img src="http://ecx.images-amazon.com/images/I/51P%2BwGcwPKL.jpg" noproxy>