S-93925A300 13 mm ID x 20.5 mm OD DIN 6797 Internal-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance through internal teeth that bite into mating surfaces, preventing loosening under dynamic loads
• Reliable locking performance maintained by 18-8 stainless steel construction, offering excellent corrosion resistance in harsh environments
• Precise dimensional compatibility with M12 fasteners (13mm ID, 20.5mm OD) ensuring perfect fit and consistent clamping force
• Manufacturing consistency guaranteed by strict adherence to DIN 6797 standards for tooth lock washers
• Enhanced durability from stainless steel material that withstands oxidation and maintains performance in industrial settings
• Environmental compliance assurance with RoHS 3 and REACH regulations, meeting global environmental standards
• Optimized thickness range (0.9-1.2mm) providing sufficient spring action while maintaining space efficiency in assemblies

Professional Applications & Engineering Value

These M12 internal tooth lock washers deliver critical engineering value in applications where vibration-induced loosening threatens assembly integrity. Manufactured from 18-8 stainless steel, they provide exceptional corrosion resistance for outdoor equipment, marine applications, and chemical processing environments where moisture and corrosive elements are present. The internal tooth configuration creates multiple biting points that securely anchor against both the fastener and workpiece, distributing locking force evenly to prevent fretting and surface damage. This design is particularly valuable in industrial machinery, automotive subsystems, and electrical enclosures where thermal cycling and operational vibrations constantly challenge fastener security. The DIN 6797 certification ensures dimensional precision and performance reliability, making these washers ideal for OEM applications requiring consistent quality across production runs.

Specification Summary & Compliance

This tooth lock washer features metric dimensions with 13mm internal diameter and 20.5mm external diameter, specifically designed for M12 screw applications. Manufactured to DIN 6797 specifications with internal tooth location, it maintains precise dimensional tolerances for reliable performance. The component is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, containing no restricted substances above threshold limits. Constructed from 18-8 stainless steel, it provides excellent mechanical properties without additional hardness rating requirements for standard industrial applications.