S-90476A111 0.266" ID x 0.75" OD ASME B18.21.1 USS Washers

Key Features & Benefits at a Glance

• Exceptional load distribution with 0.75" OD and 0.266" ID for superior surface coverage and reduced material stress
• Maximum corrosion resistance through zinc yellow-chromate plating that protects against harsh industrial environments
• Superior mechanical strength with Rockwell C43 hardness for reliable performance under heavy loads and vibration
• Heavy-duty Grade 9 classification ensuring consistent performance in demanding applications
• Precise dimensional compliance with ASME B18.21.1 standards for guaranteed interchangeability and fit
• Enhanced durability with thickness ranging from 0.065" to 0.080" for optimal compression and longevity
• Environmental compliance meeting RoHS 3 and REACH regulations for safe, sustainable industrial use

Professional Applications & Engineering Value

These Grade 9 USS flat washers are engineered to solve critical challenges in heavy-duty industrial applications where vibration, high loads, and environmental exposure compromise fastener integrity. The zinc yellow-chromate plated steel construction provides superior corrosion protection in demanding environments, while the Rockwell C43 hardness ensures maintained clamping force under extreme conditions. Perfect for structural assemblies, machinery manufacturing, and equipment maintenance, these washers prevent loosening and distribute loads effectively across 1/4" fasteners. The ASME B18.21.1 compliance guarantees dimensional precision and reliability in critical connections, making them ideal for applications where safety and performance cannot be compromised.

Specification Summary & Compliance

Manufactured to ASME B18.21.1 standards with precise dimensional tolerances including 0.266" ID, 0.75" OD, and thickness range of 0.065-0.080". These USS flat washers feature Grade 9 strength classification and Rockwell C43 hardness for consistent mechanical performance. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental safety and regulatory acceptance for industrial applications worldwide.