S-90483A192 13 mm ID x 20 mm OD DIN 433 General Purpose Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc yellow-chromate plating for extended service life in harsh industrial environments
• Precise dimensional accuracy with 13mm ID and 20mm OD ensuring perfect fit for M12 screws and consistent load distribution
• Enhanced mechanical strength with Rockwell C38 hardness providing reliable performance under high-pressure applications
• Standardized compatibility meeting DIN 433 specifications for seamless integration with existing metric fastener systems
• Consistent thickness control (1.8-2.2mm) maintaining uniform clamping force and preventing joint loosening
• Environmental compliance with RoHS 3 and REACH standards for safe use across regulated industries
• Optimized surface protection combining steel core durability with advanced plating for reduced maintenance requirements

Professional Applications & Engineering Value

Engineered for demanding industrial applications, this M12 flat washer delivers critical engineering value through its zinc yellow-chromate plated steel construction. The combination of Rockwell C38 hardness and precise metric dimensions (13mm ID × 20mm OD) addresses common failure points in machinery assembly by preventing surface deformation and maintaining bolt tension. The DIN 433 standard compliance ensures interchangeability in European equipment designs, while the corrosion-resistant plating protects against chemical exposure in manufacturing, automotive, and construction environments. This flat washer solves vibration-induced loosening issues through its controlled thickness variation (1.8-2.2mm), providing engineers with a reliable component for high-performance fastening systems that require consistent load distribution and long-term reliability.

Specification Summary & Compliance

This metric flat washer features precise dimensional tolerances per DIN 433 standard with 13mm internal diameter, 20mm outer diameter, and 1.8-2.2mm thickness range. Manufactured from zinc yellow-chromate plated steel with Rockwell C38 hardness rating, the washer complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory acceptance for international industrial applications.