S-99041A133 1.562" ID Square Washers

Key Features & Benefits at a Glance

• Superior load distribution with a 3" square design that minimizes surface pressure and prevents material damage in heavy-duty assemblies.
• Enhanced corrosion resistance thanks to the zinc-plated steel construction, ensuring long-term reliability in harsh industrial environments.
• Precise compatibility with a 1.562" inner diameter designed specifically for 1 1/2" screws, reducing installation errors and improving joint integrity.
• Consistent thickness control (0.220-0.280") for uniform clamping force and stability across high-vibration applications.
• Durable material strength with Rockwell B40 hardness, offering excellent resistance to deformation under heavy loads.
• Regulatory peace of mind as it is RoHS 3 and REACH compliant, meeting strict environmental and safety standards for industrial use.
• Versatile inch-system sizing that aligns with common industrial specifications, simplifying procurement and inventory management.

Professional Applications & Engineering Value

This zinc-plated steel square washer is engineered to address critical challenges in heavy-duty industrial applications, such as structural framing, machinery assembly, and construction projects. The 3" width and square shape significantly increase the bearing surface area, which effectively distributes clamping force and prevents bolt head or nut embedment into soft materials. Made from steel with a Rockwell B40 hardness, it resists crushing and maintains clamp load under vibration and dynamic stresses. The zinc plating provides a protective barrier against moisture and chemicals, extending service life in corrosive environments. Ideal for use with 1 1/2" screws, this washer ensures reliable performance in load-bearing connections, reducing maintenance needs and enhancing overall structural stability.

Specification Summary & Compliance

This square washer features an inner diameter of 1.562" and a thickness range of 0.220-0.280", manufactured to standard inch measurements for broad compatibility. It complies with RoHS 3 (2015/863/EU) under exemption 6(a) for lead as an alloying element in steel and is REACH (EC 1907/2006) compliant, adhering to environmental and health regulations. The Rockwell B40 hardness ensures consistent mechanical properties, supporting reliable use in industrial fastening systems.