S-97985A660 25 mm ID x 38 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 to prevent loosening under dynamic loads
• Enhanced corrosion protection through zinc-plated steel construction for extended service life in harsh environments
• Consistent locking performance maintained by Rockwell C35 hardness ensuring teeth retain their bite through multiple installations
• Precise dimensional compatibility with 25mm ID perfectly matching M24 screws and 38mm OD providing optimal load distribution
• Reliable industrial compliance meeting DIN 6797 standards for quality assurance in critical applications
• Environmental regulation adherence with RoHS 3 and REACH compliance for global supply chain integration
• Optimized thickness range (1.3-1.7mm) providing flexibility while maintaining structural integrity under compression

Professional Applications & Engineering Value

This M24 external tooth lock washer delivers critical vibration-resistant performance in demanding industrial settings where fastener security is paramount. Engineered from zinc-plated steel, the washer combines mechanical locking action with corrosion resistance, addressing the dual challenges of joint loosening and environmental degradation. The external tooth configuration creates multiple biting points that dig into both the fastener head and base material, effectively resisting rotational forces in heavy machinery, automotive assemblies, and structural frameworks. With Rockwell C35 hardness, the teeth maintain their sharpness through repeated torque cycles, ensuring consistent locking performance in applications subject to constant vibration, thermal cycling, or dynamic loading conditions where standard flat washers would fail.

Specification Summary & Compliance

Manufactured to DIN 6797 specifications with precise dimensional tolerances including 25mm internal diameter for M24 screw compatibility and 38mm external diameter. The zinc-plated steel construction provides both corrosion resistance and consistent mechanical properties. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental safety and global market acceptance for industrial applications requiring maximum reliability and regulatory adherence.