S-93925A425 13 mm ID x 20.5 mm OD DIN 6797 Internal-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance prevents fastener loosening under dynamic loads and mechanical stress
• Enhanced corrosion protection through zinc-plated steel construction for extended service life in harsh environments
• Precision internal tooth engagement ensures maximum locking force directly against the M12 screw head
• Exceptional hardness (Rockwell C42) maintains tooth integrity and prevents deformation under high clamping pressures
• DIN 6797 compliance guarantees dimensional accuracy and reliable performance in demanding industrial applications
• Regulatory compliance with RoHS 3 and REACH standards for safe use across global markets
• Optimized metric dimensions (13mm ID/20.5mm OD) provide perfect fit and consistent performance with M12 fastener systems

Professional Applications & Engineering Value

This M12 internal tooth lock washer delivers critical engineering value by solving persistent vibration-induced loosening in mechanical assemblies. The zinc-plated steel construction provides dual protection against both corrosion and wear, while the precisely engineered internal tooth location creates superior biting action that maintains clamp load integrity. Engineered to DIN 6797 standards, this washer ensures dimensional consistency for reliable performance in automotive, machinery, and heavy equipment applications where vibration resistance is paramount. The combination of Rockwell C42 hardness and optimized tooth geometry prevents embedding and maintains locking force through thermal cycles and dynamic loading conditions.

Specification Summary & Compliance

This precision washer features 13mm internal diameter and 20.5mm outer diameter with thickness ranging 0.9-1.2mm, specifically engineered for M12 screw applications. Manufactured to DIN 6797 specifications with internal tooth configuration, it ensures consistent dimensional accuracy and reliable locking performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting the latest environmental and safety standards for industrial components.