Key benefits - Prevents fastener loosening under vibration and dynamic loads - After full tightening, the groove edge and the nut surface engage for a secure lock - Durable anti-loose action provided by a spring lock washer design with bronze copper shells - Wide size range covers most common metric fasteners from M3 to M20 - Simple replacement for standard locking hardware in assemblies Specification highlights - Type: Washer with spring lock mechanism for anti-loose performance - Material: Bronze copper shells with pad spring lock washer construction - Size range: M3, M4, M5, M6, M8, M10, M12, M14, M16, M18, M20 - Application: Anti-loose solution for metric bolts and nuts in vibration-prone environments How it works - When the fastener is fully tightened, the groove edge and the material surface in the nut engage to create a secure locking effect - The spring lock washer provides continuous pressure to resist loosening during operation Recommended use scenarios - Automotive and motorcycle assemblies such as mounting brackets, engine covers, and control panels where vibration is common - Machinery and equipment installations including CNC machines, power tools, and industrial frames that experience dynamic loads - Bicycle components, outdoor furniture, and garden equipment where periodic loosening can occur Installation notes - Use with corresponding metric bolts and nuts within the listed size range (M3 to M20) - Ensure mating surfaces are clean and free of debris before installation - Verify full contact between the nut, groove edge, and lock washer to achieve optimal anti-loose performance