S-98029A118 1.875" ID x 3.375" OD Oversized Washers

Key Features & Benefits at a Glance

• Enhanced corrosion resistance with black-oxide steel finish, extending service life in demanding industrial environments.
• Optimal load distribution due to large 3.375" outer diameter, minimizing surface pressure and preventing joint loosening.
• Precise fit for 1 3/4" screws with 1.875" inner diameter, ensuring secure fastening and reducing assembly time.
• Consistent thickness (0.240-0.260") provides uniform clamping force, improving mechanical stability in heavy-duty applications.
• Compliance with RoHS 3 and REACH regulations guarantees environmental safety and meets global supply chain requirements.
• Durable steel construction offers reliable performance under high-stress conditions, ideal for construction and industrial machinery.
• Inch system compatibility simplifies sourcing and integration with standard North American equipment and components.

Professional Applications & Engineering Value

This black-oxide steel flat washer is engineered to address common industrial challenges such as corrosion-induced failure and uneven load distribution. The black-oxide surface treatment provides a protective layer that resists rust and wear, making it suitable for outdoor construction, machinery assembly, and structural applications where moisture or chemicals are present. Its generous 3.375" OD and precise 1.875" ID ensure maximum contact area and secure fit for 1 3/4" screws, reducing the risk of bolt loosening under vibration or dynamic loads. By maintaining consistent 0.240-0.260" thickness, it delivers reliable performance in heavy-duty fastening systems, enhancing the longevity and safety of industrial equipment while complying with stringent environmental standards.

Specification Summary & Compliance

This flat washer features an inner diameter of 1.875", outer diameter of 3.375", and thickness range of 0.240-0.260", designed for use with 1 3/4" screw sizes in inch measurement systems. It is manufactured from black-oxide steel for durability and corrosion resistance. The product is RoHS 3 (2015/863/EU) compliant under exemption 6(a) for lead as an alloying element in steel and REACH (EC 1907/2006) compliant as of January 17, 2023, ensuring adherence to environmental and safety regulations without rated hardness specifications.