The Hillman Group 681 Left HD Nut, 1/4-28-Inch, 12-Pack
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<b>[Product Information]</b><br>
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<li>They are also known as reverse threaded nuts</li>
<li>Cannot be used with right-hand threaded fasteners</li>
<li>Zinc finish</li>
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<img src='http://ecx.images-amazon.com/images/I/51P%2BwGcwPKL.jpg'></br>