S-95221A211 21 mm ID x 45 mm OD DIN 6796 Heavy-Vibration-Resistant Spring Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance through conical spring design, preventing fastener loosening in high-stress environments
• Enhanced corrosion protection with black-phosphate steel coating for extended service life in industrial conditions
• Precise M20 compatibility with 21mm internal diameter ensuring perfect fit for standard metric screw applications
• Reliable DIN 6796 certification guaranteeing consistent quality and dimensional accuracy across all production batches
• Optimal spring force distribution with 45mm outer diameter and 6.4mm overall height for balanced load bearing
• Environmental compliance assurance meeting both RoHS 3 and REACH standards for safe, sustainable industrial use
• Durable 5.0mm thickness providing robust compression strength and long-term performance retention

Professional Applications & Engineering Value

This M20 spring lock washer delivers critical engineering solutions for vibration-prone assemblies where fastener security is paramount. The conical lock washer design creates constant spring tension that compensates for thermal expansion, material settling, and dynamic loads - effectively solving common loosening issues in machinery, automotive, and heavy equipment applications. Manufactured from black-phosphate steel, it provides superior corrosion resistance in challenging environments while maintaining consistent spring properties. The metric spring washer conforms to DIN 6796 specifications, ensuring precise dimensional control with 21mm ID for perfect M20 screw engagement and 45mm OD for optimal load distribution. This combination of certified performance and material durability makes it ideal for industrial maintenance, manufacturing assembly lines, and construction applications requiring reliable, long-term fastener security.

Specification Summary & Compliance

This spring lock washer features precise metric dimensions with 21mm internal diameter, 45mm outer diameter, and 5.0mm thickness, manufactured to DIN 6796 standards for guaranteed dimensional accuracy and performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory acceptance for industrial applications worldwide. The black-phosphate surface treatment provides consistent corrosion protection while maintaining the mechanical properties required for reliable spring action in vibration-resistant fastening systems.