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1/4-20 Serrated Flange Nut Zinc Plated . Hex nut with a serrated bearing surface beneath the flange that displaces material on the mating surface when the nut is torqued down, forming a connection that resists loosening. Used in applications where vibration is an issue.
1/4-20 Serrated Flange Nut Zinc Plated
$0.05
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