Requires a greater amount of torque to loosen than to tighten the nutWill span oversized or poorly aligned holesDoes not gall screw threads0.347 in THKLock nutFlange provides a more uniform bearing-stress to clamp-force ratio than other low carbon lock nutsHex nut with an enlarged circular base flaring out from the bottom of the nutThe bearing surface of the flange has serrations which displace material on the mating surface when the nut is wrenched into place, forming a connection to resist looseningProduct comes in a chipboard box package