S-90483A195 21 mm ID x 34 mm OD DIN 433 General Purpose Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc yellow-chromate plating that protects against rust in harsh industrial environments
• Exceptional load distribution thanks to Rockwell C38 hardness, preventing surface damage and maintaining joint integrity
• Precise dimensional accuracy with 21mm ID and 34mm OD ensuring perfect fit for M20 screw applications
• Optimized thickness range (2.7-3.3mm) providing consistent performance under varying compression loads
• Guaranteed compliance with DIN 433 standards for reliable performance in European mechanical assemblies
• Environmental responsibility through RoHS 3 and REACH compliance, safe for regulated industries
• Long service life with steel construction that maintains structural integrity through repeated use cycles

Professional Applications & Engineering Value

This M20 flat washer delivers critical engineering solutions for industrial applications where vibration resistance and surface protection are paramount. The zinc yellow-chromate plated steel construction provides exceptional corrosion protection in demanding environments including outdoor equipment, automotive assemblies, and machinery subjected to moisture or chemical exposure. The DIN 433 standard ensures dimensional precision and compatibility with European engineering specifications, while the Rockwell C38 hardness prevents embedding and maintains clamping force integrity under heavy loads. These metric washers effectively distribute bearing pressure across a wider surface area, preventing damage to softer materials and maintaining bolted joint reliability in high-vibration applications common in manufacturing, construction, and heavy equipment industries.

Specification Summary & Compliance

This flat washer features precise dimensional specifications including 21mm internal diameter, 34mm outer diameter, and 2.7-3.3mm thickness range. Manufactured to DIN 433 standards for metric washers, it ensures proper fit and function with M20 fasteners. The product maintains full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming environmental safety and regulatory adherence for industrial applications across global markets.