Is the self-locking effect sustainable even when the nut is subjected to extreme temperature swings?
Yes. When heated, the material of the nut expands and the fastening force decreases. And when cooled, the material contracts and the fastening force increases. In the case of conventional nuts, this repeated expansion and contraction of the material causes the nut to loosen. However, the Hard Lock Nut maintains its fastened condition because of the wedge effect, s it does not loosen even under repeated exposure to extremes of temperature.
