S-91133A211 9 mm ID Square Washers

Key Features & Benefits at a Glance

• Superior load distribution with 50mm square design for maximum surface contact and reduced point loading
• Enhanced corrosion resistance through galvanized steel construction for extended service life in harsh environments
• Consistent dimensional accuracy with precise 9mm inner diameter for perfect M6 screw compatibility
• Exceptional mechanical strength with Rockwell B40 hardness rating for reliable performance under heavy loads
• Full regulatory compliance meeting RoHS 3 and REACH standards for safe industrial use
• Optimized thickness design at 6.0mm providing ideal balance between strength and installation flexibility
• Metric system compatibility ensuring seamless integration with international industrial equipment and machinery

Professional Applications & Engineering Value

This galvanized steel square washer delivers critical engineering solutions for industrial applications where load distribution and corrosion resistance are paramount. The 50mm square configuration provides significantly larger bearing surface compared to standard round washers, effectively preventing material deformation and joint loosening in heavy-duty assemblies. The M6-compatible design with precise 9mm inner diameter ensures perfect alignment with standard metric fasteners, while the galvanized coating protects against rust and chemical degradation in manufacturing, construction, and outdoor equipment applications. Engineered to maintain structural integrity under sustained pressure, these industrial washers solve common failure points in machinery bases, structural steel connections, and automotive assemblies where vibration and environmental exposure compromise fastener performance.

Specification Summary & Compliance

This metric square washer features precise dimensions of 50mm width, 9mm inner diameter, and 6.0mm thickness with standard manufacturing tolerances for consistent M6 screw compatibility. Manufactured from galvanized steel with Rockwell B40 hardness rating, the product complies with RoHS 3 (2015/863/EU) under exemption 6(a) for lead as an alloying element in steel and is fully REACH (EC 1907/2006) compliant with the latest SVHC list (updated 01/17/2023, 233 substances). The washer meets international metric standards for industrial fastener applications.