S-90313A318 0.938" ID x 3" OD Oversized Washers

Key Features & Benefits at a Glance

• Exceptional corrosion resistance thanks to 18-8 stainless steel construction, ideal for harsh or humid environments.
• Optimized load distribution with a large 3" outer diameter, reducing surface pressure and preventing material damage.
• Precise fit for 7/8" screws with a 0.938" inner diameter, ensuring secure fastening and alignment in assemblies.
• Robust and durable build with a thickness of 0.240-0.272", providing reliable performance under heavy-duty conditions.
• Compliance with strict environmental standards, including RoHS 3 and REACH, ensuring safe and sustainable use.
• Versatile inch-series sizing for seamless integration with standard industrial equipment and components.
• Long-term reliability in demanding applications due to the material's inherent strength and surface integrity.

Professional Applications & Engineering Value

This 18-8 stainless steel flat washer is engineered to address common industrial challenges such as joint loosening, surface wear, and corrosion-induced failure. Its substantial 3" OD and precise 0.938" ID work together to distribute clamping force evenly, protecting sensitive surfaces and maintaining bolt tension in high-vibration settings. Made from corrosion-resistant 18-8 stainless steel, it excels in applications exposed to moisture, chemicals, or outdoor elements—from heavy machinery and structural frameworks to marine and food processing equipment. The inch-series design ensures compatibility with standard 7/8" screws, making it a dependable choice for engineers and procurement specialists seeking durability and compliance in critical assemblies.

Specification Summary & Compliance

This flat washer features an inner diameter of 0.938", outer diameter of 3", and thickness ranging from 0.240" to 0.272", designed to fit 7/8" screw sizes in inch-series applications. Manufactured from 18-8 stainless steel, it adheres to industry-accepted dimensional standards for reliable performance. The product is confirmed to be RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant, meeting stringent environmental and safety regulations for hazardous substances.