S-91090A118 0.531" ID x 2" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion protection with zinc-plated steel construction for extended service life in demanding environments
• Precise dimensional compatibility with 0.531" inner diameter specifically engineered for 1/2" screw applications
• Optimal load distribution through generous 2" outer diameter design, reducing surface pressure and preventing material damage
• Consistent performance ensured by controlled thickness range of 0.042-0.051" for reliable seating and spacing
• Environmental compliance meeting RoHS 3 and REACH standards for safe use in regulated industrial applications
• Heavy-duty construction providing durable support for mechanical assemblies requiring robust fastening solutions
• Inch system compatibility ensuring seamless integration with existing imperial measurement equipment and specifications

Professional Applications & Engineering Value

This zinc-plated steel flat washer delivers critical engineering solutions for industrial applications where corrosion resistance and dimensional precision are paramount. The 0.531" ID provides exact compatibility with 1/2" screw sizes, eliminating play and ensuring secure fastening in mechanical assemblies, construction projects, and heavy equipment. The substantial 2" OD effectively distributes clamping force across wider surface areas, preventing surface damage to connected materials while maintaining joint integrity under vibration and load variations. The zinc plating creates a protective barrier against moisture and environmental contaminants, significantly extending service life in outdoor applications, manufacturing facilities, and marine environments where corrosion would otherwise compromise fastener performance.

Specification Summary & Compliance

This flat washer features precise dimensional specifications including 0.531" inner diameter, 2" outer diameter, and thickness range of 0.042-0.051" for consistent performance in inch system applications. Manufactured from zinc-plated steel for enhanced durability, the product maintains full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring suitability for regulated industrial and commercial applications requiring verified material safety and environmental responsibility.