S-97985A640 19 mm ID x 30 mm OD DIN 6797 External-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance with external teeth that bite into mating surfaces, preventing loosening under dynamic loads
• Enhanced corrosion protection from zinc-plated steel construction, extending service life in harsh industrial environments
• Precise dimensional compatibility with M18 screws (19mm ID, 30mm OD) ensuring easy installation and reliable fit
• Exceptional mechanical strength with Rockwell C35 hardness for repeated use without deformation in high-stress applications
• Guaranteed compliance with DIN 6797 standards, providing consistent performance and interchangeability
• Regulatory safety assurance through RoHS 3 and REACH compliance, meeting strict environmental and health standards
• Optimized load distribution with 1.2-1.6mm thickness, reducing surface pressure and preventing damage to assembled components

Professional Applications & Engineering Value

This M18 external tooth lock washer delivers critical vibration resistance in demanding industrial settings where fastener security is paramount. Engineered to DIN 6797 standards with zinc-plated steel construction, it addresses common failure points in machinery, automotive assemblies, and heavy equipment by maintaining clamp force under continuous shock and vibration. The external tooth configuration provides aggressive biting action into both bolt head and workpiece, creating a mechanical lock that outperforms standard flat washers. With Rockwell C35 hardness, it withstands repeated torque cycles without losing spring tension, making it ideal for maintenance-critical applications where disassembly is frequent. The corrosion-resistant zinc plating ensures long-term reliability in environments exposed to moisture, chemicals, or temperature variations.

Specification Summary & Compliance

Manufactured to DIN 6797 specifications with metric dimensions (19mm ID, 30mm OD, 1.2-1.6mm thickness) for M18 screw applications. Features external tooth location and Rockwell C35 hardness for consistent locking performance. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and material restrictions adherence for global industrial use.