S-97985A211 3.9 mm ID x 7 mm OD DIN 6797 External-Tooth Lock Washers
External-Tooth Lock Washers
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Basic Information
Dimension Parameters
Material & Strength Parameters
Installation & Application Parameters
Finish & Compliance Parameters
Special Type Parameters
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Key Features & Benefits at a Glance
- Superior vibration resistance with external teeth that bite into mating surfaces, preventing loosening under dynamic loads.
- Enhanced durability and corrosion protection from zinc-plated steel construction, ideal for harsh industrial environments.
- Precise fit for M3.5 screws with 3.9mm ID and 7mm OD, ensuring easy installation and reliable performance.
- High hardness (Rockwell C35) provides excellent wear resistance and maintains locking force over repeated use.
- Compliance with DIN 6797 standards guarantees consistent quality, dimensional accuracy, and interchangeability.
- External tooth design offers optimal grip on the bearing surface, reducing the risk of fastener failure.
- RoHS 3 and REACH compliance ensures environmental safety and meets global regulatory requirements for industrial components.
Professional Applications & Engineering Value
This M3.5 zinc-plated steel tooth lock washer is engineered to address common challenges in industrial fastening, such as vibration-induced loosening and material fatigue. The external tooth design under DIN 6797 ensures that each tooth engages firmly with the surface, distributing load evenly and maintaining clamp force in high-stress applications like machinery, automotive assemblies, and electrical enclosures. Made from zinc-plated steel, it resists corrosion and extends service life in demanding conditions. By providing reliable locking performance, it reduces maintenance downtime and enhances safety in metric fastener systems, making it a cost-effective solution for engineers and procurement specialists.
Specification Summary & Compliance
This washer meets DIN 6797 specifications for dimensional accuracy, including an ID of 3.9mm, OD of 7mm, and thickness of 0.9-1.2mm, with external tooth location. It is manufactured from zinc-plated steel with a hardness of Rockwell C35 and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards, ensuring environmental and safety adherence for industrial use.
