What is the primary purpose of a lock washer?

The primary purpose of a lock washer is to prevent loosening due to vibration. Lock washers are specifically designed with a unique shape that allows them to grip the surface of the bolt and the material being fastened. When a bolt is tightened, the lock washer compresses and exerts a force that keeps the bolt in place. This is especially important in applications where machinery is subject to vibrations, such as in automotive or industrial settings. The lock washer acts as a mechanical barrier, ensuring that the fastener remains tight over time, thereby maintaining structural integrity and preventing potential failures caused by loose screws.