S-99041A151 0.438" ID Square Washers

Key Features & Benefits at a Glance

• Enhanced load distribution with a 2" square design to prevent surface damage and reduce point stress in heavy-duty assemblies.
• Superior corrosion resistance from zinc-plated steel, ensuring long-term durability in harsh industrial environments.
• Precise fit for 3/8" screws with a 0.438" inner diameter, minimizing installation errors and improving joint integrity.
• Consistent performance under load thanks to Rockwell B40 hardness, providing reliable strength without deformation.
• Optimized thickness range (0.225-0.265") for uniform pressure application and vibration resistance in dynamic applications.
• Compliance with environmental standards, including RoHS 3 and REACH, ensuring safe, sustainable use in global supply chains.
• Versatile inch-system compatibility for seamless integration with standard industrial equipment and fastening systems.

Professional Applications & Engineering Value

This zinc-plated steel square washer is engineered to address common industrial challenges, such as uneven load distribution and fastener loosening under vibration. Its 2" width and robust material provide a larger bearing surface, effectively spreading force to protect soft substrates and prevent bolt head embedding. The Rockwell B40 hardness ensures the washer maintains its shape under high stress, reducing maintenance needs in heavy-duty applications like machinery assembly, structural frameworks, and automotive components. With superior corrosion resistance, it excels in outdoor or humid settings, while the precise 0.438" ID guarantees a secure fit for 3/8" screws, streamlining installation and enhancing safety in critical joints.

Specification Summary & Compliance

This square washer adheres to inch-system dimensions with an inner diameter of 0.438", thickness range of 0.225-0.265", and width of 2", ensuring compatibility with standard 3/8" screw fasteners. Manufactured from zinc-plated steel with a hardness of Rockwell B40, it meets industry requirements for strength and durability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its suitability for environmentally conscious industrial applications.