S-91133A217 26 mm ID Square Washers

Key Features & Benefits at a Glance

• Enhanced Load Distribution - Square shape provides greater surface contact area compared to round washers, preventing fastener embedment and material damage
• Superior Corrosion Resistance - Galvanized steel construction offers excellent protection against rust and environmental degradation in demanding industrial settings
• Exceptional Mechanical Strength - Rockwell B40 hardness rating ensures reliable performance under heavy loads and repeated stress applications
• Precision Fit for M20 Fasteners - 26mm inner diameter provides optimal clearance and alignment for M20 screw applications
• Maximum Bearing Surface - 50mm width combined with 6.0mm thickness creates substantial load-spreading capability for structural applications
• Global Compliance Assurance - Meets RoHS 3 and REACH environmental standards for international industrial projects and regulated industries
• Metric System Compatibility - Designed for seamless integration with metric fastening systems and engineering specifications

Professional Applications & Engineering Value

This M20 square washer delivers critical engineering solutions where standard round washers fall short. The galvanized steel construction provides essential corrosion resistance for outdoor equipment, structural steel connections, and marine applications where moisture exposure is a constant concern. The square configuration offers superior load distribution across a wider surface area, preventing the washer from digging into softer materials like wood or composite substrates. With its 6.0mm thickness and Rockwell B40 hardness, this washer maintains structural integrity under heavy vibration and dynamic loading conditions common in machinery bases, construction frameworks, and industrial equipment assembly. The precise 26mm ID ensures proper fitment with M20 fasteners while the generous 50mm width provides maximum bearing surface for critical joint applications requiring reliable, long-term performance.

Specification Summary & Compliance

This metric square washer features precise dimensional specifications including 26mm inner diameter, 50mm width, and 6.0mm thickness, manufactured to standard metric tolerances for consistent performance. The galvanized steel material provides both mechanical strength and corrosion protection, while the Rockwell B40 hardness rating ensures durability under load. The product is fully compliant with RoHS 3 (2015/863/EU) with exemption 6(a) for lead as an alloying element in steel and meets REACH (EC 1907/2006) requirements as of January 17, 2023, including compliance with 233 SVHC substances, making it suitable for regulated industrial applications worldwide.