S-93925A417 3.2 mm ID x 6 mm OD DIN 6797 Internal-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance prevents fastener loosening in high-stress environments, ensuring long-term assembly integrity
• Zinc-plated steel construction provides excellent corrosion resistance for extended service life in industrial conditions
• Internal tooth design creates maximum biting action into both bearing surface and fastener head for secure locking performance
• Rockwell C42 hardness rating delivers exceptional durability and maintains tooth integrity under repeated loading cycles
• Precision M3 sizing (3.2mm ID x 6mm OD) ensures perfect compatibility with standard metric fasteners for easy installation
• DIN 6797 compliance guarantees consistent quality and dimensional accuracy across all production batches
• Environmental compliance with RoHS 3 and REACH standards makes these washers suitable for regulated industries worldwide

Professional Applications & Engineering Value

This M3 internal tooth lock washer addresses critical vibration-induced loosening challenges in industrial machinery, automotive assemblies, and electronic enclosures. The zinc-plated steel construction combined with the internal tooth configuration creates a mechanical locking action that bites into both mating surfaces, effectively resisting rotational forces and maintaining clamp load. The Rockwell C42 hardness ensures the teeth maintain their sharp biting edges through multiple installation cycles, while the thin profile (0.3-0.5mm thickness) accommodates space-constrained applications. These metric lock washers are particularly valuable in applications where thermal cycling, mechanical shocks, or constant vibration would compromise standard flat washers, providing engineers with a reliable solution for mission-critical fastening joints.

Specification Summary & Compliance

Manufactured to DIN 6797 specifications with precise dimensional tolerances, this tooth lock washer features 3.2mm internal diameter, 6mm outer diameter, and 0.3-0.5mm thickness specifically designed for M3 screw applications. The product maintains full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring suitability for global industrial markets. The zinc-plated surface treatment provides consistent corrosion protection while maintaining the mechanical locking performance required for demanding applications.