S-90481A254 0.656" ID x 3.5" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion protection with zinc-plated steel construction, extending service life in demanding environments
• Optimal load distribution thanks to the large 3.5" outer diameter, minimizing surface damage and material stress
• Precise 5/8" screw compatibility with 0.656" inner diameter for secure, accurate fit in industrial assemblies
• Enhanced durability in heavy-duty applications with robust steel material and consistent thickness ranging from 0.074" to 0.121"
• Reliable performance in regulated industries with full compliance to RoHS 3 and REACH environmental standards
• Broad compatibility with inch-system components for seamless integration into existing machinery and equipment

Professional Applications & Engineering Value

This heavy-duty flat washer is engineered to address critical challenges in industrial assembly, where vibration loosening, surface damage, and corrosion can compromise structural integrity. The zinc-plated steel construction provides a durable barrier against moisture and chemicals, significantly extending the lifespan of bolted connections in outdoor equipment, construction machinery, and manufacturing systems. Its large 3.5" OD effectively distributes clamping force over a wider area, preventing embedding into softer materials and reducing the risk of joint failure. Designed for 5/8" screw size compatibility, this flat washer ensures precise alignment and secure fastening in high-stress applications, from structural steelwork to heavy vehicle assemblies, delivering reliable performance where safety and longevity are paramount.

Specification Summary & Compliance

This flat washer features an inner diameter of 0.656", outer diameter of 3.5", and thickness range of 0.074" - 0.121", manufactured to standard inch system dimensions for consistent fit and function. It is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to environmental and safety standards for industrial use. The product is designed for general-purpose applications where specific hardness ratings are not required, providing reliable performance in various mechanical and structural assemblies.