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Serrated Hex Flange Bolts, Grade 5, Zinc Plated

Also known as:  

Hex Frame Flange Bolts, Hex Washer Frame Bolts, Hex Flange Screws

Flange Bolts allow a greater distribution of the load due to their large bearing surface head design. Also use them with irregular and oversized holes. Measure the length from under the flange to the tip.
      For higher torque driving and a smaller head, use 12 Point Flange Bolts, which can be driven using a standard 12-point socket. Measure length from under the head.
      Serrated Flange Bolts feature a serrated bearing surface that provides a grip on the mating material as the screw is tightened to resist loosening. Less torque is needed to install than remove because of the angle of the serrations. Length is measured from under the head.