S-90481A137 0.688" ID x 3.25" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with galvanized steel construction, extending service life in humid or outdoor environments
• Optimal load distribution from the large 3.25" outer diameter, preventing surface damage and joint loosening
• Precise 5/8" screw compatibility with 0.688" inner diameter, ensuring secure fastening and reduced installation time
• Enhanced durability with 0.108-0.140" thickness range, maintaining structural integrity under heavy loads
• Environmental compliance meeting RoHS 3 and REACH standards, safe for regulated industries
• Heavy-duty performance in inch measurement system, ideal for North American industrial specifications
• Reliable flat washer design providing consistent sealing and vibration resistance in mechanical assemblies

Professional Applications & Engineering Value

This galvanized steel flat washer delivers critical engineering solutions where corrosion resistance and load-bearing capacity are paramount. The zinc coating effectively combats rust in marine, construction, and infrastructure applications, while the substantial 3.25" OD distributes clamping force across wider surfaces - preventing material deformation in wood, metal, and composite assemblies. Specifically engineered for 5/8" screw fasteners in inch-system applications, it eliminates compatibility issues in industrial maintenance, heavy machinery, and structural steel connections. The flat washer design ensures uniform pressure distribution, reducing stress concentration points that lead to fastener failure in high-vibration environments like manufacturing equipment and transportation infrastructure.

Specification Summary & Compliance

Manufactured to standard inch system dimensions with 0.688" inner diameter and 3.25" outer diameter, maintaining precise flat washer geometry for consistent performance. The thickness tolerance of 0.108-0.140" ensures reliable seating in various applications. This industrial galvanized steel washer complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting the latest environmental safety standards for hazardous substance restrictions. Suitable for general-purpose fastening where hardness ratings are not specified.