It isn’t as simple as just clamping forces. There are many different types of locking nuts because there are many different performance needs. Some, such as those that use polymer plugs, are light application and only to prevent vibration from causing the nut to loosen. Others, such as many used on things like automotive spindles, are designed to deform to prevent extreme vibration combined with torque forces from causing them to loosen… many of these should not be reused after removal. Do your homework when working on cars and follow the manufacturer’s recommendations. Some applications, such as those on sway bar links, use locking devices combined with fine threads to ensure positive lock. Many such as those with the dent in the side are designed for general use, such as on swingsets, where vibration, torsional forces, and other mechanical environmental forces aren’t a factor. I used those for the framework of my workbench.