S-90481A224 0.285" ID x 2" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance from the black-oxide steel finish, extending service life in harsh industrial environments.
• Optimal load distribution with a large 2" outer diameter, minimizing surface pressure and preventing material damage.
• Precise fit for 1/4" screws with a 0.285" inner diameter, ensuring secure fastening and reducing assembly time.
• Enhanced durability and stability provided by the 0.047-0.080" thickness range, resisting deformation under stress.
• Compliance with major environmental regulations including RoHS 3 and REACH, ensuring safe use in regulated industries.
• Versatile inch system compatibility for seamless integration with standard North American machinery and equipment.
• Reliable performance in demanding applications due to the robust steel construction, suitable for heavy-duty mechanical assemblies.

Professional Applications & Engineering Value

This black-oxide steel flat washer is engineered to address common industrial challenges such as fastener loosening, surface wear, and corrosion-induced failure. The black-oxide surface treatment provides a protective layer that significantly reduces oxidation, making it ideal for outdoor equipment, automotive assemblies, and machinery exposed to moisture or chemicals. Its generous 2" OD ensures even load distribution, preventing stress concentration on soft materials, while the precise 0.285" ID guarantees a snug fit on 1/4" screws, minimizing vibration-related issues. By combining material strength with advanced coating technology, this washer delivers long-term reliability, reduces maintenance costs, and supports efficient industrial washer applications in construction, manufacturing, and heavy engineering sectors.

Specification Summary & Compliance

This flat washer adheres to standard inch system dimensions with an inner diameter of 0.285", outer diameter of 2", and thickness ranging from 0.047" to 0.080", designed specifically for use with 1/4" screw sizes. It conforms to general industrial fastening standards for fit and function. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets strict environmental and safety requirements for hazardous substances, making it suitable for global supply chains and regulated applications.