S-97985A780 8.4 mm ID x 15 mm OD DIN 6798 External-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance through external tooth design that bites into mating surfaces to prevent loosening under dynamic loads
• Enhanced corrosion protection with zinc-plated steel construction for extended service life in demanding industrial environments
• Precise M8 compatibility with 8.4mm internal diameter ensuring perfect fit and optimal load distribution
• Consistent performance maintained by Rockwell C35 hardness for reliable spring action and tooth engagement
• Global compliance assurance meeting DIN 6798 standards for quality and dimensional accuracy
• Environmental responsibility with RoHS 3 and REACH compliance for safe use in regulated industries
• Optimized contact surface with 15mm outer diameter providing maximum bearing area for secure fastening

Professional Applications & Engineering Value

This M8 external tooth lock washer delivers critical vibration-resistant performance in demanding mechanical assemblies. The zinc-plated steel construction provides excellent corrosion resistance while maintaining the necessary Rockwell C35 hardness for consistent spring action. The external tooth configuration creates multiple biting points that dig into both the fastener and workpiece, effectively preventing rotation and loosening in high-vibration environments such as automotive components, industrial machinery, and electrical enclosures. Engineered to DIN 6798 specifications, this metric lock washer ensures dimensional precision and reliable performance in critical applications where fastener security is paramount. The combination of material strength, surface treatment, and tooth geometry makes it ideal for maintaining joint integrity in dynamic loading conditions.

Specification Summary & Compliance

This external tooth lock washer features precise dimensional specifications with 8.4mm internal diameter, 15mm outer diameter, and 0.8-0.9mm thickness specifically designed for M8 fasteners. Manufactured to DIN 6798 standards with Rockwell C35 hardness for optimal performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory acceptance for industrial applications worldwide.