Conelok nuts have a locking mechanism that’s built into the cone. As you screw it on, it begins to act like a locking nut. Its self-contained feature creates frictional interference between the threads of the mating components. When fastening a prevailing torque lock nut (aka Conelok Nut), there is a resistance to rotation during both assembly and disassembly, requiring them to be wrenched. That resistance is called prevailing torque. They can be adjusted or removed after installation.These Nuts are Great for areas where heat and chemicals can apply. Always check suitability for your job at hand.