S-98689A222 3.7 mm ID x 7 mm OD DIN 433 General Purpose Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction, ideal for harsh environments and extending service life.
• Enhanced load distribution from precise 3.7mm ID and 7mm OD, preventing surface damage and loosening under M3.5 screw pressure.
• Consistent mechanical strength ensured by Rockwell B75 hardness, providing reliable performance in repetitive or high-stress assemblies.
• Guaranteed dimensional accuracy per DIN 433 standard, ensuring seamless fit and interchangeability in metric fastening systems.
• Optimal thickness control (0.5-0.6mm) for balanced spacing and vibration resistance without adding unnecessary bulk.
• Compliance with strict environmental regulations including RoHS 3 and REACH, making them safe for global industrial supply chains.
• Broad industrial applicability due to metric sizing and stainless material, suitable for machinery, electronics, and automotive sectors.

Professional Applications & Engineering Value

This M3.5 DIN 433 flat washer addresses critical engineering challenges in industrial applications where corrosion, vibration, and precise fit are paramount. Made from 18-8 stainless steel, it resists oxidation and chemical exposure, reducing maintenance in humid or corrosive settings. The metric dimensions (3.7mm ID x 7mm OD) and controlled thickness ensure even pressure distribution under M3.5 screws, preventing joint failure and material deformation. Its Rockwell B75 hardness provides durability against wear, while compliance with DIN 433 guarantees consistency in automated assembly lines. Ideal for machinery, electrical enclosures, and automotive components, this washer delivers long-term reliability and cost savings by minimizing replacements.

Specification Summary & Compliance

This flat washer meets DIN 433 specifications for dimensional accuracy, with an inner diameter of 3.7mm, outer diameter of 7mm, and thickness ranging from 0.5–0.6mm. It is manufactured from 18-8 stainless steel and hardened to Rockwell B75 for consistent performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and suitable for use in regulated industries worldwide.