S-91100A343 4.4 mm ID x 11.7 mm OD DIN 9021 Oversized Washers
Oversized Washers
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Basic Information
Dimension Parameters
Material & Strength Parameters
Installation & Application Parameters
Finish & Compliance Parameters
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Key Features & Benefits at a Glance
- Superior corrosion resistance with zinc-plated steel construction, extending service life in demanding environments
- Precise dimensional accuracy with 4.4mm ID and 11.7mm OD ensuring perfect fit for M4 fasteners
- Optimized load distribution with 0.9-1.1mm thickness, preventing surface damage and maintaining joint integrity
- Guaranteed compatibility with Class 8.8 fasteners, meeting rigorous industrial strength requirements
- Standardized performance compliant with DIN 9021 specifications for reliable, interchangeable use
- Environmental compliance with RoHS 3 and REACH regulations, ensuring safe usage in regulated industries
- Enhanced assembly efficiency with metric sizing for seamless integration into international projects
Professional Applications & Engineering Value
This M4 zinc-plated steel flat washer delivers critical engineering solutions where corrosion resistance and load distribution are paramount. The zinc-plated steel construction provides essential protection against environmental degradation, while the DIN 9021 compliance ensures dimensional precision for reliable performance with Class 8.8 fasteners. In industrial machinery, automotive assemblies, and electrical enclosures, these metric washers prevent fastener loosening, reduce surface stress, and maintain joint integrity under vibration and thermal cycling. The combination of standardized dimensions and regulatory compliance makes them ideal for OEM manufacturing and maintenance applications requiring consistent, long-term reliability.
Specification Summary & Compliance
Manufactured to DIN 9021 standards with precise metric dimensions: 4.4mm inner diameter, 11.7mm outer diameter, and 0.9-1.1mm thickness. Designed specifically for use with M4 Class 8.8 fasteners in industrial applications. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring adherence to international safety and substance restriction requirements.
