S-97985A611 13 mm ID x 20.5 mm OD DIN 6797 External-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance through external teeth that bite into mating surfaces, preventing loosening under dynamic loads
• Enhanced corrosion protection with zinc-plated steel construction, extending service life in demanding environments
• Precision dimensional accuracy with 13mm ID and 20.5mm OD ensuring perfect fit for M12 fasteners
• Exceptional hardness rating of Rockwell C35 maintains tooth integrity and locking performance under high stress
• Certified compliance with DIN 6797 standards guarantees consistent quality and reliable mechanical performance
• Environmental responsibility through RoHS 3 and REACH compliance, meeting strict regulatory requirements
• Optimized thickness range (0.9-1.2mm) provides ideal spring tension while accommodating surface variations

Professional Applications & Engineering Value

This M12 external tooth lock washer delivers critical vibration resistance in demanding industrial applications where joint integrity is paramount. The zinc-plated steel construction provides essential corrosion protection while the precisely engineered external teeth create multiple biting points that dig into both the fastener and workpiece surfaces. This design effectively prevents rotational loosening in heavy-duty equipment, automotive assemblies, and machinery subjected to constant vibration or thermal cycling. Manufactured to DIN 6797 specifications, these metric lock washers ensure dimensional consistency and reliable performance in critical bolted connections, making them ideal for maintenance, manufacturing, and assembly operations requiring dependable locking security.

Specification Summary & Compliance

This external tooth lock washer features precise dimensional specifications including 13mm internal diameter, 20.5mm external diameter, and 0.9-1.2mm thickness range. Manufactured in compliance with DIN 6797 standards for dimensional accuracy and mechanical properties, with Rockwell C35 hardness ensuring optimal performance. The product meets RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) environmental standards, confirming adherence to the latest regulatory requirements for hazardous substances.