Commonly found on brake rotor bolts that interface between the rotor and mounting hub, as well as other brake mounting bolt applications (and sometimes side pod nerf bar bolts), these metal locking nuts are built to take some serious abuse!
Integrated metal locking structure prevents loosening of bolts during high-temperature operation, making them perfect for use on a brake system.
Often, racing series require a nut like this to make a kart race ready!
