S-91201A011 0.203" ID x 0.5" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior load distribution with a 0.5" outer diameter, reducing surface pressure and preventing damage to assembled materials.
• Precise fit for No. 10 screws thanks to the 0.203" inner diameter, ensuring secure fastening and minimizing loosening risks.
• Enhanced durability and wear resistance from Rockwell B84 hardness, extending service life in high-stress industrial environments.
• Consistent thickness control between 0.089" and 0.099", providing reliable performance and ease of installation in repetitive assemblies.
• Environmental compliance assurance with RoHS 3 and REACH standards, meeting global regulatory requirements for safe usage.
• Robust steel construction offers excellent strength and corrosion resistance, ideal for demanding mechanical applications.
• Versatile inch-system compatibility for seamless integration with standard industrial equipment and fastener systems.

Professional Applications & Engineering Value

This steel flat washer is engineered to address common industrial challenges such as joint failure, surface deformation, and vibration-induced loosening. Its Rockwell B84 hardness ensures it withstands repetitive loads and harsh conditions, making it suitable for heavy-duty machinery, automotive assemblies, and construction equipment. The precise 0.203" ID and 0.5" OD dimensions provide optimal load distribution, protecting components from stress concentration. With RoHS 3 and REACH compliance, it meets stringent environmental and safety standards, offering reliability in industrial washers applications where material integrity and regulatory adherence are critical.

Specification Summary & Compliance

This flat washer adheres to inch-system measurements with an inner diameter of 0.203", outer diameter of 0.5", and thickness ranging from 0.089" to 0.099", designed specifically for No. 10 screw compatibility. Manufactured from high-quality steel with a Rockwell B84 hardness, it ensures dimensional accuracy and performance consistency. The product is fully compliant with RoHS 3 (2015/863/EU) under exemption 6(a) for lead as an alloying element in steel and REACH (EC 1907/2006) regulations, affirming its suitability for global industrial use without compromising on safety or durability.