S-97985A113 7.4 mm ID x 12.5 mm OD DIN 6797 External-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance with external teeth that bite into mating surfaces to prevent loosening under dynamic loads
• Enhanced corrosion protection through zinc-plated steel construction for extended service life in industrial environments
• Precision dimensional compatibility with 7.4mm ID specifically engineered for M7 screw applications
• Exceptional mechanical durability with Rockwell C35 hardness maintaining tooth integrity through repeated use
• Guaranteed standardization through DIN 6797 compliance ensuring consistent performance and interchangeability
• Environmental regulation compliance meeting RoHS 3 and REACH standards for safe industrial use
• Optimized load distribution with 12.5mm OD providing stable bearing surface for secure fastening

Professional Applications & Engineering Value

This M7 external tooth lock washer delivers critical anti-vibration performance in demanding industrial applications where mechanical fastening security is paramount. The zinc-plated steel construction provides essential corrosion resistance while the precisely positioned external teeth create multiple biting points that resist rotational forces and maintain clamping force under continuous vibration. Engineered to DIN 6797 standards, this washer solves common loosening issues in machinery, automotive assemblies, and electrical enclosures where thermal cycling and operational vibrations compromise standard flat washers. The combination of Rockwell C35 hardness and precise metric dimensions ensures reliable performance in high-stress applications, making it an essential component for maintenance professionals and OEM manufacturers requiring dependable locking solutions.

Specification Summary & Compliance

This precision metric lock washer features 7.4mm internal diameter, 12.5mm outer diameter, and 0.7-0.9mm thickness with external tooth configuration per DIN 6797 specifications. Manufactured from zinc-plated steel with Rockwell C35 hardness, the component maintains dimensional accuracy and mechanical properties required for industrial fastening systems. Compliance includes DIN 6797 manufacturing standards, RoHS 3 (2015/863/EU) environmental directives, and REACH (EC 1907/2006) regulations for hazardous substances.