S-4340N112 4.3 mm ID x 8 mm OD DIN 6798 Countersunk Tight-Grip External-Tooth Lock Washers
Countersunk Tight-Grip External-Tooth Lock Washers
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Basic Information
Dimension Parameters
Material & Strength Parameters
Installation & Application Parameters
Finish & Compliance Parameters
Geometric 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 corrosion protection through zinc-plated steel construction, extending service life in harsh industrial environments
- Perfect flush mounting with 90° countersink angle ensuring smooth surface alignment with DIN-standard fasteners
- Optimized for M4 screw applications with precise 4.3mm ID and 8mm OD dimensions for secure fit and consistent performance
- Exceptional durability backed by Rockwell C35 hardness rating, maintaining tooth integrity through repeated installation cycles
- Regulatory compliance assurance meeting RoHS 3 and REACH standards for global industrial applications
- Reliable locking performance through DIN 6798 certification, ensuring standardized quality and interchangeability
Professional Applications & Engineering Value
These M4 external tooth lock washers solve critical vibration-induced loosening problems in industrial machinery, automotive assemblies, and electrical enclosures. The zinc-plated steel construction provides essential corrosion resistance while the precisely engineered 90° countersink angle ensures perfect flush mounting with DIN-standard fasteners. The external tooth configuration creates multiple biting points that dig into both the bolt head and mating surface, distributing locking force evenly to prevent rotational slippage. This design is particularly valuable in applications subject to thermal cycling or mechanical stress where maintaining clamp load integrity is crucial for operational safety and reduced maintenance intervals.
Specification Summary & Compliance
Manufactured to DIN 6798 specifications with precise dimensional tolerances: 4.3mm internal diameter, 8mm outer diameter, and 0.2-0.3mm thickness range. The metric tooth lock washers feature standardized 90° countersink angle compatibility and 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 for industrial fastener applications.
