S-93925A422 7.4 mm ID x 12.5 mm OD DIN 6797 Internal-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance with internal tooth design that bites into mating surfaces to prevent loosening under dynamic loads
• Enhanced corrosion protection through zinc-plated steel construction for extended service life in demanding environments
• Consistent performance with Rockwell C42 hardness ensuring dimensional stability and reliable locking force
• Precise M7 compatibility with 7.4mm ID and 12.5mm OD dimensions for perfect fit with standard metric fasteners
• Industry-standard compliance meeting DIN 6797 specifications for guaranteed interchangeability and quality
• Environmental responsibility with RoHS 3 and REACH compliance for safe use in regulated applications
• Optimal load distribution from 0.7-0.9mm thickness providing secure fastening without material deformation

Professional Applications & Engineering Value

These M7 tooth lock washers deliver critical vibration resistance in industrial applications where fastener security is paramount. The zinc-plated steel construction provides excellent corrosion resistance while maintaining the Rockwell C42 hardness needed for repeated use in heavy machinery, automotive assemblies, and electrical enclosures. The internal tooth configuration ensures maximum biting action into both the fastener and workpiece, creating a mechanical lock that outperforms standard flat washers in high-vibration environments. Engineered to DIN 6797 standards, these metric lock washers offer reliable performance in manufacturing equipment, transportation systems, and industrial maintenance where consistent clamping force is essential for operational safety and reduced maintenance intervals.

Specification Summary & Compliance

This tooth lock washer features precise dimensional specifications with 7.4mm internal diameter, 12.5mm outer diameter, and 0.7-0.9mm thickness range. Manufactured to DIN 6797 standards with internal tooth location and Rockwell C42 hardness for consistent 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 across global markets.