S-91106A128 6.4 mm ID x 11 mm OD DIN 6797 Internal-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance with internal teeth that bite into mating surfaces, preventing loosening under dynamic loads
• Enhanced durability from Rockwell C35 hardened black-oxide steel construction that resists wear and corrosion
• Precise dimensional fit with 6.4mm ID and 11mm OD ensuring optimal performance with M6 fasteners
• Reliable compliance with DIN 6797 standards for consistent quality and interchangeability
• Environmental responsibility through RoHS 3 and REACH compliance, meeting strict regulatory requirements
• Secure locking action from internal tooth design that maintains clamp force in high-stress applications
• Optimized thickness (0.6-0.8mm) providing sufficient spring action while maintaining space efficiency

Professional Applications & Engineering Value

This M6 internal tooth lock washer delivers critical vibration-resistant performance in demanding industrial environments where fastener security is paramount. The black-oxide steel construction with Rockwell C35 hardness ensures exceptional durability against wear and mild corrosion, while the precisely engineered internal teeth create multiple biting points that dig into both the fastener and mating surface. This design prevents rotational loosening in applications subject to constant vibration, thermal cycling, or dynamic loading. DIN 6797 compliance guarantees dimensional accuracy and reliable performance in industrial machinery, automotive assemblies, and electrical equipment where M6 fasteners require permanent, secure locking solutions that maintain joint integrity over extended service life.

Specification Summary & Compliance

This precision metric lock washer features 6.4mm internal diameter, 11mm outer diameter, and 0.6-0.8mm thickness with internal tooth location per DIN 6797 specifications. Manufactured from black-oxide steel with Rockwell C35 hardness, the washer meets dimensional and performance requirements for Class A precision. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial applications while maintaining superior locking performance for M6 screw sizes.