S-91100A180 13 mm ID x 37 mm OD DIN 9021 Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, extending service life in harsh industrial environments
• Precise dimensional accuracy meeting DIN 9021 standards for reliable fit with M12 screws and consistent performance
• Enhanced load distribution with 37mm outer diameter, reducing surface pressure and preventing material damage
• Exceptional mechanical strength with Rockwell B56 hardness, maintaining shape under heavy loads and vibration
• Wide industrial compatibility with metric sizing (13mm ID) for seamless integration into global machinery and equipment
• Regulatory compliance assurance with RoHS 3 and REACH adherence, ensuring safe use in regulated industries
• Optimized thickness range (2.7-3.3mm) providing ideal balance between spacing needs and structural stability

Professional Applications & Engineering Value

This M12 flat washer delivers critical engineering solutions for industrial assembly challenges. The zinc-plated steel material provides excellent corrosion protection in demanding environments like automotive manufacturing, machinery frames, and outdoor equipment, significantly reducing maintenance frequency. Its compliance with DIN 9021 ensures precise dimensional tolerances and reliable performance with M12 screws, preventing loosening under vibration while distributing clamp load effectively across the 37mm diameter. The Rockwell B56 hardness maintains structural integrity under repetitive stress, making it ideal for heavy-duty applications where fastener failure is not an option. These features combine to create a metric washer that enhances assembly longevity while meeting strict industry regulations.

Specification Summary & Compliance

This flat washer features precise metric dimensions with 13mm inner diameter, 37mm outer diameter, and 2.7-3.3mm thickness range, manufactured to DIN 9021 specifications for dimensional accuracy and performance reliability. The product maintains full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory acceptance across industrial markets. Manufactured from zinc-plated steel with Rockwell B56 hardness, it delivers consistent mechanical properties for professional fastener applications.