S-91106A123 3.7 mm ID x 7 mm OD DIN 6797 Internal-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance with Rockwell C35 hardness steel construction, preventing fastener loosening in high-stress environments
• Reliable locking performance through internal tooth design that bites into mating surfaces for secure fastening
• Precision dimensional accuracy with 3.7mm ID and 7mm OD ensuring perfect fit for M3.5 screw applications
• Enhanced corrosion protection from black-oxide surface treatment, extending service life in demanding conditions
• Industry-standard compliance with DIN 6797 specifications for guaranteed quality and interchangeability
• Environmental responsibility through RoHS 3 and REACH compliance, meeting strict regulatory requirements
• Optimal material thickness (0.4-0.6mm) providing consistent performance without adding unnecessary bulk

Professional Applications & Engineering Value

This M3.5 metric tooth lock washer delivers critical engineering solutions where vibration-induced fastener failure poses significant risks. The black-oxide steel construction combined with Rockwell C35 hardness creates a durable component that maintains clamping force under dynamic loads. The internal tooth location design ensures positive locking action by embedding into both the bearing surface and fastener head, preventing rotational slip in machinery, automotive assemblies, and electrical enclosures. Engineered to DIN 6797 standards, this washer provides reliable performance in precision equipment where consistent torque retention is essential. The vibration-resistant properties make it ideal for applications subject to continuous motion or impact loads, reducing maintenance frequency and preventing costly downtime.

Specification Summary & Compliance

Manufactured to DIN 6797 specifications with precise dimensional tolerances, featuring 3.7mm internal diameter and 7mm outer diameter. The black-oxide steel construction provides consistent performance with 0.4-0.6mm thickness range. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe usage across global markets. The internal tooth configuration and material hardness (Rockwell C35) meet international standards for locking washer performance in industrial applications.