S-91106A131 8.4 mm ID x 15 mm OD DIN 6797 Internal-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance with internal tooth design that bites into mating surfaces to prevent loosening under dynamic loads.
• Enhanced durability provided by Black-Oxide Steel material offering good corrosion resistance and a Rockwell C35 hardness for long service life.
• Precise fit for M8 screws with an 8.4 mm inner diameter ensuring secure, reliable fastening in metric assemblies.
• Reliable performance in industrial environments due to compliance with the stringent DIN 6797 standard for dimensional and functional quality.
• Environmental and regulatory safety with full RoHS 3 and REACH compliance, meeting global substance restrictions.
• Optimized load distribution from the 15 mm outer diameter and 0.7-0.9 mm thickness, reducing surface pressure and material stress.
• Internal tooth location that minimizes visible damage to the external surface while providing effective locking action.

Professional Applications & Engineering Value

This M8 internal tooth lock washer is engineered to solve critical issues in high-vibration and dynamic load environments. The internal tooth design ensures the teeth grip securely onto the fastener and assembly surface, effectively resisting rotational loosening caused by machinery, engines, or transport equipment. Manufactured from Black-Oxide Steel, it provides a protective layer against corrosion, extending component life in harsh industrial settings. Its compliance with DIN 6797 guarantees precise dimensions and reliable performance, making it ideal for automotive, heavy machinery, and electrical enclosures where vibration resistance is paramount. The combination of material strength and specialized tooth geometry delivers consistent clamping force, preventing joint failure and reducing maintenance needs.

Specification Summary & Compliance

This washer conforms to DIN 6797 specifications, ensuring dimensional accuracy for the M8 screw size with an ID of 8.4 mm, OD of 15 mm, and thickness of 0.7-0.9 mm. It is manufactured from Black-Oxide Steel with a hardness of Rockwell C35. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from hazardous substances and suitable for use in regulated industrial applications.