S-90377A168 0.344" ID x 3" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance from 18-8 stainless steel with black-oxide coating, ideal for harsh industrial environments
• Optimal load distribution with 3" outer diameter, reducing surface pressure and preventing material damage
• Precise fit for 5/16" screws with 0.344" inner diameter, ensuring secure fastening and alignment
• Versatile thickness range of 0.050-0.080" accommodates varying assembly requirements and gap adjustments
• Long-term reliability in inch-system applications, maintaining performance under mechanical stress
• Environmentally compliant construction meeting RoHS 3 and REACH standards for safe global usage
• Enhanced durability in heavy-duty assemblies, resisting wear and degradation over time

Professional Applications & Engineering Value

This heavy-duty flat washer addresses critical engineering challenges in industrial assemblies where corrosion resistance and load distribution are paramount. The black-oxide 18-8 stainless steel construction provides exceptional protection against rust and chemical exposure, making it suitable for outdoor equipment, marine hardware, and chemical processing facilities. With a 3" OD and 0.344" ID, it effectively disperses clamping force for 5/16" screw applications, preventing joint loosening and surface indentation. The precise inch-system dimensions ensure compatibility with standard North American machinery, while the 0.050-0.080" thickness range allows for tolerance compensation in bolted connections, reducing maintenance needs and extending service life in demanding industrial washers applications.

Specification Summary & Compliance

This flat washer features inch-system dimensions with an inner diameter of 0.344", outer diameter of 3", and thickness range of 0.050-0.080", designed specifically for 5/16" screw sizes. Manufactured from 18-8 stainless steel with a black-oxide surface treatment, it provides consistent performance in mechanical assemblies. The product fully complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across industrial sectors without hazardous substance restrictions.