S-93925A221 3.7 mm ID x 7 mm OD DIN 6797 Internal-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance with internal teeth that bite into mating surfaces to prevent loosening under dynamic loads
• Excellent corrosion resistance provided by 18-8 stainless steel construction for long-term reliability in harsh environments
• Precision dimensional control with 3.7mm ID and 7mm OD ensuring perfect fit for M3.5 fasteners in metric assemblies
• Industry-standard compliance with DIN 6797 specifications guaranteeing consistent performance and interchangeability
• Environmental regulation adherence through RoHS 3 and REACH compliance for global supply chain compatibility
• Optimal spring action from 0.4-0.6mm thickness providing maintained tension and secure locking performance
• Internal tooth design that concentrates locking force directly under the screw head for maximum fastening security

Professional Applications & Engineering Value

This M3.5 internal tooth lock washer delivers critical vibration-resistant fastening solutions for demanding industrial applications where secure locking is paramount. Manufactured from 18-8 stainless steel, these washers provide exceptional corrosion resistance for equipment exposed to moisture, chemicals, or outdoor elements. The internal tooth configuration creates multiple biting points that dig into both the fastener and workpiece, effectively preventing rotational loosening caused by vibration, thermal cycling, or dynamic loads. This design is particularly valuable in precision assemblies where space constraints limit external locking devices. The DIN 6797 compliance ensures dimensional accuracy and performance consistency across automotive, aerospace, electronics, and machinery applications where metric fastening systems require reliable, long-term vibration protection without compromising material integrity.

Specification Summary & Compliance

This internal tooth lock washer features precise dimensions of 3.7mm internal diameter, 7mm outer diameter, and 0.4-0.6mm thickness, specifically engineered for M3.5 screw applications. Manufactured in compliance with DIN 6797 standards for dimensional accuracy and performance requirements. The component is constructed from 18-8 stainless steel and fully complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in industrial applications worldwide while maintaining consistent locking performance across temperature variations and mechanical stresses.