S-97985A720 3.2 mm ID x 6 mm OD DIN 6798 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 plating that extends service life in demanding industrial environments
• Precision dimensional control with 3.2mm ID and 6mm OD ensuring perfect fit for M3 fasteners in metric assemblies
• Exceptional hardness durability with Rockwell C35 rating maintaining tooth integrity through repeated installation cycles
• Guaranteed standardization through DIN 6798 compliance ensuring interchangeability and reliable performance
• Environmental responsibility with full RoHS 3 and REACH compliance meeting strict international regulatory requirements
• Optimized load distribution from external tooth design that minimizes surface damage while maximizing clamping force

Professional Applications & Engineering Value

These M3 external tooth lock washers deliver critical anti-vibration performance in precision assemblies where fastener security is paramount. Manufactured from zinc-plated steel with precisely formed external teeth, they create permanent locking action by embedding into both the fastener head and base material. This DIN 6798 compliant design solves common loosening problems in vibration-prone applications such as motor mounts, machinery guards, and electronic enclosures. The Rockwell C35 hardness ensures teeth maintain their biting capability through multiple disassembly cycles, while the metric dimensions (3.2mm ID × 6mm OD) provide exact compatibility with M3 fastening systems. These lock washers are engineered to maintain joint integrity in automotive, industrial equipment, and precision manufacturing applications where reliability cannot be compromised.

Specification Summary & Compliance

This external tooth lock washer features precision dimensions of 3.2mm internal diameter and 6mm outer diameter with 0.4-0.5mm thickness, specifically engineered for M3 screw applications. Manufactured to DIN 6798 standards with Rockwell C35 hardness for consistent performance. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental responsibility and global market acceptance.