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1/2-13 Serrated Flange Hex Lock Nuts Case Hardened HR15N 78/90 Zinc Bake. Hex head screws are designed to be driven by a wrench or pneumatic tools.<br><br>

1/2-13  Serrated Flange Hex Lock Nuts Case Hardened HR15N 78/90 Zinc Bake, Pkg of 250

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