S-91117A240 0.812" ID x 3" OD Oversized Washers

Key Features & Benefits at a Glance

• Enhanced corrosion resistance with zinc-plated steel construction, ideal for harsh industrial environments and outdoor applications.
• Superior load distribution thanks to the large 3" outer diameter, reducing surface pressure and preventing material damage.
• Precise fit for 3/4" screws with a 0.812" inner diameter, ensuring secure fastening and minimizing loosening under vibration.
• Exceptional durability from Rockwell B40 hardness, providing reliable performance under heavy loads and repeated stress.
• Consistent thickness (0.235-0.265") for uniform pressure application and ease of installation in assembly lines.
• Compliance with environmental standards including RoHS 3 and REACH, meeting global regulatory requirements for safe usage.
• Versatile inch system compatibility, making it suitable for a wide range of machinery and equipment using imperial measurements.

Professional Applications & Engineering Value

This zinc-plated steel flat washer is engineered to address common industrial challenges such as fastener corrosion and joint failure. The zinc plating provides a protective barrier against moisture and chemicals, extending the lifespan of assemblies in demanding settings like construction, automotive, and heavy machinery. With its 3" OD and robust Rockwell B40 hardness, it effectively distributes clamping force, preventing surface indentation and maintaining bolt tension under dynamic loads. Ideal for use with 3/4" screws, this washer ensures reliable performance in structural applications, reducing maintenance needs and enhancing safety. Its compliance with RoHS 3 and REACH standards further supports sustainable operations, making it a trusted choice for engineers prioritizing both performance and regulatory adherence.

Specification Summary & Compliance

This flat washer features precise dimensions including an ID of 0.812", OD of 3", and thickness ranging from 0.235" to 0.265", designed for use with 3/4" screw sizes in inch measurement systems. Manufactured from zinc-plated steel with a hardness of Rockwell B40, it ensures consistent performance and durability. The product complies with RoHS 3 (2015/863/EU) under exemption 6(a) for lead in steel alloys and REACH (EC 1907/2006) standards, confirming adherence to environmental and safety regulations for industrial applications.