S-91133A140 0.562" 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 through galvanized steel construction, ensuring long-term reliability in harsh industrial environments
• Precision fit for 1/2" screws with 0.562" inner diameter, providing secure fastening and reducing installation errors
• Exceptional durability with Rockwell B40 hardness rating, offering consistent performance under repeated stress and vibration
• Consistent thickness control (0.235-0.265") for uniform pressure distribution and reliable sealing in assembly applications
• Full regulatory compliance with RoHS 3 and REACH standards, ensuring safe use across global industrial markets
• Heavy-duty construction specifically engineered for demanding applications in construction and industrial machinery

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 superior protection against environmental degradation, making it ideal for outdoor construction equipment, structural steel connections, and machinery subjected to moisture or chemical exposure. The square design offers significantly larger surface contact area compared to round washers, effectively preventing embedment into soft materials and distributing clamping force across a wider area. With its Rockwell B40 hardness and precise 0.562" inner diameter for 1/2" screw applications, this washer maintains dimensional stability under extreme pressure, reducing the risk of joint failure in heavy machinery, structural frameworks, and industrial assembly operations where vibration and dynamic loads are common.

Specification Summary & Compliance

This square washer features inch system dimensions with 3" width, 0.562" inner diameter, and controlled thickness range of 0.235-0.265" for precise fitment. Manufactured from galvanized steel with Rockwell B40 hardness rating, it meets industrial standards for heavy-duty applications. 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, including 233 SVHC substances, ensuring environmental responsibility and regulatory acceptance in global markets.