S-90452A111 Washers for Square-Neck Bolts

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction for extended service life in demanding environments
• Precise square hole alignment with 0.617" inside width ensures secure fit and prevents rotation with 1/2" fasteners
• Optimal load distribution through 1.125" outer diameter design, reducing surface pressure and material stress
• Consistent performance maintained by controlled 0.055-0.065" thickness range for reliable spacing and clamping applications
• Environmental compliance assurance with RoHS 3 and REACH compliance, meeting strict international regulatory standards
• Heavy-duty industrial suitability through robust steel material construction capable of withstanding high-stress applications
• Inch system compatibility ensures seamless integration with existing imperial measurement equipment and fasteners

Professional Applications & Engineering Value

This zinc-plated steel square hole washer delivers critical engineering solutions for industrial applications requiring anti-rotation security and enhanced corrosion protection. The specialized square hole design (0.617" inside width) effectively prevents washer spin-out during vibration or dynamic loading conditions common in machinery, construction, and heavy equipment assemblies. The zinc plating provides sacrificial protection against rust and environmental degradation, significantly extending component lifespan in outdoor or high-moisture environments. With its 1.125" OD and controlled thickness tolerance, this heavy-duty washer ensures proper load distribution while maintaining consistent spacing for 1/2" fasteners, making it ideal for structural connections, equipment mounting, and industrial maintenance where reliability is paramount.

Specification Summary & Compliance

This square hole washer features precise dimensional specifications including 1.125" outer diameter, 0.617" inside width, and thickness maintained between 0.055-0.065". Manufactured to inch system standards for compatibility with 1/2" fasteners. The product demonstrates full compliance with RoHS 3 (2015/863/EU) regulations and REACH (EC 1907/2006) standards current through June 14, 2023, addressing 235 Substances of Very High Concern. Constructed from zinc-plated steel for consistent performance in industrial applications.