S-90313A238 0.688" ID x 3.5" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance thanks to 18-8 stainless steel construction, ideal for harsh industrial environments
• Exceptional load distribution with a large 3.5" outer diameter, minimizing surface pressure and material stress
• Precise fit for 5/8" screws with 0.688" inner diameter, ensuring secure fastening and reduced vibration loosening
• Enhanced durability and longevity from robust 0.122-0.145" thickness, suitable for heavy-duty applications
• Global compliance assurance with RoHS 3 and REACH standards, meeting international environmental and safety regulations
• Reliable inch system compatibility for seamless integration with standard US measurement-based assemblies
• Versatile industrial application across machinery, construction, and equipment requiring flat, corrosion-resistant spacing

Professional Applications & Engineering Value

This 18-8 stainless steel flat washer is engineered to address common industrial challenges such as corrosion-induced failure and uneven load distribution. Its inch system dimensions (0.688" ID x 3.5" OD) provide a precise match for 5/8" screw size applications, ensuring stable fastening in high-vibration settings like heavy machinery, structural frameworks, and outdoor equipment. The material's inherent resistance to rust and chemicals reduces maintenance frequency, while the flat design prevents bolt head or nut embedding into soft surfaces. Ideal for industrial washers use in manufacturing, marine, and chemical processing sectors, it delivers long-term reliability and cost efficiency by minimizing replacement needs and downtime.

Specification Summary & Compliance

This flat washer adheres to standard inch measurement tolerances with an inner diameter of 0.688", outer diameter of 3.5", and thickness range of 0.122-0.145". It is manufactured for compatibility with 5/8" screw size and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory alignment for global industrial supply chains.