The Hillman Group 43452 5/16-18-Inch x Locking Flange Nut, 15-Pack
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<b>[Product Information]</b><br>
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<li>Flange lock nuts are one piece, all-metal prevailing torque hex flange nuts</li>
<li>The protruding circular flange increases the nut's bearing surface allowing them to be used with irregular and oversized holes</li>
<li>Grade 8 alloy steel</li>
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