Split (split-ring) lock washers — metal spring washers that stop nuts, bolts and screws from loosening under vibration and friction. Key benefits Prevents fastener loosening: the split, spring-like design resists rotation and keeps nuts, bolts and screws from backing off under vibration. Improves stability and safety: maintains tight joints on machinery and assemblies to reduce maintenance and downtime. Even load distribution: helps spread the clamping force from a fastener over a larger area, protecting the joined parts and the fastener head. Fast, tool-light installation: fits between the fastener and the mating surface and can be fitted by hand or with standard tightening tools. Product attributes Function: split lock washer that secures and stabilizes threaded fasteners by providing spring tension and anti-rotation action. Material: metal spring washer for durable elastic performance and long service life. Compatibility: designed to be used with nuts and screws of the same nominal size; installs directly between the fastener and the contact surface. Performance: resists loosening caused by vibration and friction while distributing load to protect the joint. Practical applications Automotive and powersports: secure wheel components, brackets and engine fittings that experience constant vibration. Industrial machinery and equipment: maintain tight connections on motors, conveyors and machine frames to ensure reliable operation. Building, assembly and repair: use in structural connections, HVAC assemblies and service panels where repeated vibration or thermal cycling can loosen fasteners. Installation tips Select the lock washer that matches the fastener size. Place the washer between the fastener head or nut and the mating surface, then tighten with standard tools. Inspect during routine maintenance and replace if the washer shows wear, loss of spring tension, or corrosion. What you get A simple, proven metal spring washer that increases joint reliability, reduces the chance of loosening under vibration, and protects threaded connections by sharing load evenly.