S-90495A193 0.531" ID x 3" OD Oversized Washers

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with zinc yellow-chromate plating that protects against rust in harsh industrial environments
• Superior load distribution thanks to the large 3" outer diameter that minimizes surface pressure and prevents material damage
• Maximum strength reliability with Grade 8 classification ensuring consistent performance under extreme mechanical stress
• Precise fit and alignment with 0.531" inner diameter designed specifically for 1/2" screws to prevent loosening
• Enhanced durability from Rockwell C38 hardness that maintains structural integrity under repeated heavy loads
• Environmental compliance assurance meeting both RoHS 3 and REACH standards for safe, sustainable industrial use
• Optimized thickness tolerance (0.085-0.101") ensuring consistent performance and reliable installation across applications

Professional Applications & Engineering Value

This Grade 8 flat washer delivers critical engineering solutions for heavy-duty industrial applications where fastener failure is not an option. The combination of zinc yellow-chromate plated steel construction and Rockwell C38 hardness addresses common industrial challenges including vibration-induced loosening, surface corrosion in demanding environments, and material deformation under extreme pressure. The precisely engineered 3" outer diameter provides superior load distribution for structural steel connections, heavy machinery assembly, and construction applications, while the corrosion-resistant plating ensures long-term reliability in outdoor or chemically exposed settings. These industrial washers are specifically designed to maintain clamping force integrity in high-vibration environments where standard washers would fail.

Specification Summary & Compliance

Manufactured to inch system specifications with precise dimensional tolerances: 0.531" inner diameter, 3" outer diameter, and thickness range of 0.085-0.101". This Grade 8 flat washer meets the highest industry standards for fastener strength classification and features Rockwell C38 hardness for consistent mechanical performance. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across global industrial markets while maintaining exceptional corrosion resistance through zinc yellow-chromate plating.