Lock washers are specialized fasteners designed to prevent nuts and bolts from loosening due to vibration or rotational forces. They function by creating a spring-like action that applies a constant force on the connection, keeping it secure.

Lock washers utilize a split-ring design that provides tension against the bolt or nut. As the fastener is tightened, the split ring compresses, creating a friction-increasing surface. This friction counteracts rotational movement, effectively locking the connection in place.

Lock washers are particularly valuable in applications subject to dynamic loads or vibrations, such as machinery, vehicles, and construction equipment. They are also ideal for situations where maintaining the integrity of the connection is crucial, such as in electrical systems or when fastening components that are difficult to access.

Lock washers come in various types, including split lock washers, star lock washers, and spring lock washers. Split lock washers are the most common and feature a single split ring. Star lock washers have multiple split rings arranged in a star pattern, providing enhanced locking action. Spring lock washers are made from a spring-steel coil and offer a high level of vibration resistance.