S-91106A120 2.2 mm ID x 4.5 mm OD DIN 6797 Internal-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance with internal teeth design that bites into mating surfaces to prevent loosening under dynamic loads.
• Enhanced durability and corrosion resistance from black-oxide steel construction, extending service life in harsh industrial environments.
• Precise fit for M2 screws with 2.2 mm inner diameter and 4.5 mm outer diameter, ensuring reliable alignment and secure fastening.
• Consistent performance under stress thanks to Rockwell C35 hardness, maintaining tooth integrity and locking force.
• Compliance with DIN 6797 standards guarantees dimensional accuracy and interchangeability for metric fastener systems.
• Safe for regulated industries with RoHS 3 and REACH compliance, meeting environmental and safety requirements.
• Easy installation and removal with standardized thickness (0.2–0.4 mm), facilitating maintenance without damage to components.

Professional Applications & Engineering Value

This M2 metric tooth lock washer is engineered to address common challenges in high-vibration and precision assembly applications. Made from black-oxide steel, it provides excellent resistance to rust and wear, ideal for electronics, automotive, and machinery where environmental factors can compromise fastener integrity. The internal tooth location ensures maximum grip on the screw head and surface, distributing load evenly to prevent fretting and loosening over time. By adhering to DIN 6797, it offers reliable performance in metric-based systems, reducing downtime and maintenance costs. Its compact design (2.2 mm ID, 4.5 mm OD) fits seamlessly into tight spaces, making it a go-to solution for industrial lock washers requiring precision and durability.

Specification Summary & Compliance

This washer meets DIN 6797 specifications for dimensional tolerances, including inner diameter of 2.2 mm, outer diameter of 4.5 mm, and thickness range of 0.2–0.4 mm. It is manufactured from black-oxide steel with a hardness of Rockwell C35, ensuring consistent quality. Compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), confirming it is free from hazardous substances and suitable for global industrial use.