S-91128A482 1.562" ID Square Washers

Key Features & Benefits at a Glance

• Superior Load Distribution with a substantial 3" width and 0.235-0.265" thickness, minimizing surface pressure and preventing material damage.
• Enhanced Durability and Corrosion Resistance from the Black-Oxide Steel finish, extending service life in demanding industrial environments.
• Precise Fit for 1 1/2" Screws with a 1.562" Inner Diameter, ensuring secure fastening and reducing the risk of loosening under vibration.
• High Mechanical Strength backed by a Rockwell 15N80 hardness rating, providing reliable performance under heavy loads.
• Compliance with Major Environmental Regulations, including RoHS 3 and REACH, ensuring safety and suitability for global supply chains.
• Optimized for Inch-System Applications, making it a direct replacement and easy specification for standard imperial projects.
• Square Shape Design offers increased surface contact area compared to round washers, improving stability in structural assemblies.

Professional Applications & Engineering Value

This heavy-duty square washer is engineered to solve critical challenges in construction, heavy machinery, and structural steelwork. The Black-Oxide Steel material provides a protective layer that resists rust and wear, which is essential for outdoor or high-moisture industrial applications. Its large 3" width and specific thickness range are calculated to distribute clamping force over a wider area, preventing bolt embedment and joint failure in soft materials or under dynamic loads. The precise 1.562" ID ensures a perfect fit for 1 1/2" screw size fasteners, maintaining alignment and enhancing the integrity of the bolted connection. This makes it an indispensable component for engineers requiring reliable, long-lasting load distribution in critical assemblies.

Specification Summary & Compliance

This square washer conforms to standard inch system dimensions with an Inner Diameter of 1.562", Width of 3", and a controlled Thickness of 0.235-0.265". The manufacturing ensures consistent geometry for reliable performance. It is RoHS 3 (2015/863/EU) compliant under exemption 6(a) for lead in steel and is REACH (EC 1907/2006) compliant as of January 17, 2023, meeting the latest environmental and safety standards for industrial components.