S-97069A103 3.7 mm ID x 7 mm OD DIN 137A Heavy-Vibration-Resistant Spring Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance prevents fastener loosening in high-stress environments, ensuring long-term joint integrity.
• Zinc-plated steel construction provides excellent corrosion resistance, extending service life in various industrial conditions.
• Precision DIN 137A curved design delivers consistent spring action and reliable load distribution for M3.5 screw applications.
• Rockwell C42 hardness rating maintains structural integrity under repeated compression cycles and heavy loads.
• Compact 1.4mm overall height allows installation in space-constrained assemblies without compromising performance.
• Full RoHS 3 and REACH compliance ensures environmental responsibility and global regulatory acceptance for your projects.
• Metric sizing compatibility (3.7mm ID/7mm OD) enables seamless integration with standard M3.5 fastener systems.

Professional Applications & Engineering Value

This M3.5 metric spring lock washer solves critical vibration-induced loosening problems in industrial applications through its engineered curved DIN 137A design. The zinc-plated steel material provides essential corrosion protection while maintaining the spring tension needed for permanent fastener security. In automotive assemblies, electronic enclosures, and machinery where M3.5 fasteners are specified, the washer's curved shape creates continuous opposing force that compensates for thermal expansion, material relaxation, and operational vibrations. The combination of Rockwell C42 hardness and precise metric dimensions (3.7mm ID, 7mm OD) ensures reliable performance in both static and dynamic loading conditions, making it an essential component for vibration-resistant fastening systems.

Specification Summary & Compliance

This spring lock washer meets DIN 137A specifications with precise metric dimensions: 3.7mm internal diameter, 7mm outer diameter, and 0.4mm thickness. Manufactured from zinc-plated steel with Rockwell C42 hardness, it maintains dimensional accuracy per international standards. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory acceptance for global industrial applications.