S-91133A188 1.312" ID Square Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with galvanized steel construction, ensuring long-term reliability in harsh industrial environments.
• Optimal load distribution due to the 2" square shape and 1.312" inner diameter, reducing stress and preventing surface damage.
• Enhanced durability from Rockwell B40 hardness, maintaining structural integrity under high-pressure applications.
• Precise compatibility with 1 1/4" screw sizes, simplifying installation and improving assembly efficiency.
• Consistent thickness control between 0.220-0.280", providing reliable performance and uniform clamping force.
• Compliance with global standards including RoHS 3 and REACH, ensuring safe and sustainable use in regulated industries.
• Versatile inch system design for seamless integration into various mechanical and construction projects.

Professional Applications & Engineering Value

This galvanized steel square washer is engineered to address common industrial challenges such as fastener loosening and material degradation. Its square design offers a larger surface area compared to round washers, effectively distributing load and minimizing embedding in soft materials. The zinc coating provides a protective barrier against moisture and chemicals, extending service life in outdoor or corrosive settings like construction, machinery, and infrastructure projects. With a precise 1.312" ID and compatibility for 1 1/4" screw sizes, it ensures secure fastening in heavy-duty assemblies, reducing maintenance needs and enhancing overall system reliability. Ideal for applications requiring robust industrial washers that meet stringent environmental and performance standards.

Specification Summary & Compliance

This washer features an inner diameter of 1.312", width of 2", and thickness range of 0.220-0.280", manufactured to inch system specifications for accurate fit. It complies with RoHS 3 (2015/863/EU) under exemption 6(a) for lead in steel alloys and REACH (EC 1907/2006) standards, ensuring adherence to environmental and safety regulations. The Rockwell B40 hardness confirms consistent material strength, supporting reliable performance in demanding mechanical applications.