S-91235A611 3.2 mm ID x 8 mm OD Heavy-Vibration-Resistant Spring Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance maintains secure fastening in high-motion environments
• Exceptional corrosion protection from black-oxide stainless steel construction
• Optimized spring tension delivers consistent locking force for M3 screw applications
• Precision dimensional control (3.2mm ID/8mm OD) ensures perfect fit and uniform pressure distribution
• Enhanced durability with Rockwell C38 hardness for long-term performance under load
• Regulatory compliance meets RoHS 3 and REACH standards for global industrial use
• Reliable thermal and chemical resistance suitable for demanding operating conditions

Professional Applications & Engineering Value

This M3 metric spring lock washer addresses critical vibration-induced loosening in industrial assemblies. The black-oxide stainless steel construction provides dual protection against corrosion and wear, while the spring design maintains constant tension under dynamic loads. Engineers specify these vibration resistant washers for automotive subsystems, electrical enclosures, and machinery where thermal cycling and chemical exposure are concerns. The precise 0.5mm thickness and 0.7mm overall height ensure compatibility with standard M3 fasteners while maximizing locking force in confined spaces. These characteristics make it ideal for maintenance-critical applications requiring reliable long-term performance without frequent retightening.

Specification Summary & Compliance

Manufactured to metric dimensional standards with 3.2mm internal diameter and 8mm outer diameter. The black-oxide stainless steel construction provides consistent performance with Rockwell C38 hardness rating. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental and safety standards are met for industrial distribution and use.