Nut Hex Serrated Flange 3-8-16, 100 Per Box
Serrated Hex Flange Lock Nuts Zinc: Hex nut with an enlarged circular base flaring out from the bottom of the nut. The bearing surface of the flange is serrated, which resists loosening. Requires a greater amount of torque to loosen than to tighten the nut. Will span oversized holes. Does not gall screw threads.
