S-91133A170 0.938" ID Square Washers

Key Features & Benefits at a Glance

• Superior load distribution with a large 3" square surface area to prevent surface damage and maintain joint integrity under heavy loads
• Enhanced corrosion resistance thanks to the galvanized steel construction, ensuring long-term durability in harsh industrial environments
• Precise compatibility with 7/8" screw sizes and 0.938" inner diameter for secure, reliable fastening in inch-system applications
• Exceptional mechanical strength with Rockwell B40 hardness, providing reliable performance under high-stress conditions
• Consistent thickness control between 0.235-0.265" for uniform pressure distribution and reduced installation variability
• Regulatory compliance assurance with RoHS 3 and REACH standards, meeting strict environmental and safety requirements for industrial use
• Versatile industrial application designed for machinery, structural assemblies, and heavy equipment where reliable load-bearing washers are critical

Professional Applications & Engineering Value

This heavy-duty square washer addresses critical engineering challenges in industrial fastening systems where load distribution and corrosion resistance are paramount. The galvanized steel construction provides essential protection against environmental degradation, significantly extending service life in outdoor applications, chemical processing environments, and high-moisture conditions. The square profile offers superior surface contact area compared to round washers, effectively preventing embedment into soft materials and distributing clamping forces more evenly across joined components. Engineered specifically for 7/8" screw applications in inch-system machinery and structural assemblies, this washer solves common issues of joint loosening, surface deformation, and premature fastener failure. The combination of Rockwell B40 hardness and precise dimensional control ensures consistent performance in heavy machinery, construction equipment, and industrial frameworks where vibration resistance and long-term reliability are non-negotiable requirements.

Specification Summary & Compliance

This square washer features precise dimensional specifications including 0.938" inner diameter, 3" width, and controlled thickness ranging from 0.235" to 0.265" for consistent performance. Manufactured from galvanized steel with Rockwell B40 hardness, it meets industrial standards for inch-system fasteners. The product is fully compliant with RoHS 3 (2015/863/EU) under exemption 6(a) for lead as an alloying element in steel and REACH (EC 1907/2006) regulations current as of January 17, 2023, ensuring adherence to environmental and safety protocols for industrial components.