S-90481A115 0.535" ID x 1.5" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance from galvanized steel construction, extending service life in harsh environments
• Precise dimensional fit with 0.535" inner diameter ensuring secure seating on 1/2" screws
• Optimal load distribution through 1.5" outer diameter design, preventing surface damage and joint loosening
• Consistent performance maintained across 0.051-0.080" thickness range for reliable installation
• Environmental compliance assurance meeting RoHS 3 and REACH standards for global industrial applications
• Heavy-duty construction suitable for demanding mechanical and structural applications
• Inch-system compatibility for seamless integration with existing North American equipment and fasteners

Professional Applications & Engineering Value

This galvanized steel flat washer delivers critical engineering value by solving common industrial fastening challenges. The zinc-coated surface treatment provides exceptional protection against rust and corrosion in outdoor construction, marine environments, and manufacturing facilities where moisture exposure is constant. The precise 0.535" inner diameter ensures perfect alignment with 1/2" screw sizes, eliminating play that can lead to joint failure. With its substantial 1.5" outer diameter, this flat washer effectively distributes clamping force across wider surfaces, preventing material deformation in wood, metal, and composite assemblies. The inch-system design makes it ideal for American-made machinery, structural steel connections, and maintenance operations where reliable industrial washers are essential for long-term structural integrity.

Specification Summary & Compliance

Manufactured to standard inch dimensions with precise 0.535" ID and 1.5" OD specifications for consistent performance with 1/2" screw applications. The thickness range of 0.051-0.080" ensures proper fit and function across manufacturing tolerances. This galvanized steel flat washer complies with RoHS 3 (2015/863/EU) restrictions on hazardous substances and meets REACH (EC 1907/2006) requirements for chemical safety, making it suitable for regulated industrial and construction markets worldwide.