S-98970A317 2.125" ID x 4.5" OD ASME B18.21.1 USS Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with hot-dipped galvanized steel coating for extended service life in harsh environments
• Heavy-duty load distribution with 4.5" outer diameter to prevent surface damage and maintain joint integrity
• Precise compatibility with 2" screw sizes thanks to 2.125" inner diameter for secure fastening applications
• Enhanced durability through robust 0.153-0.213" thickness range that withstands high-pressure industrial conditions
• Guaranteed dimensional accuracy meeting USS standards and ASME B18.21.1 specifications for reliable performance
• Environmental compliance with RoHS 3 (2015/863/EU) regulations for safe, sustainable industrial use
• Versatile inch system sizing ensuring easy integration with existing machinery and equipment setups

Professional Applications & Engineering Value

This hot-dipped galvanized steel USS flat washer delivers exceptional engineering value in demanding industrial environments where corrosion and mechanical stress are primary concerns. The heavy-duty construction with precise 2.125" ID and 4.5" OD dimensions provides optimal load distribution, preventing surface indentation and maintaining structural integrity in applications ranging from construction frameworks to heavy machinery assembly. The hot-dipped galvanization process creates a thick, durable zinc coating that offers superior protection against rust and environmental degradation, significantly extending service life in outdoor or high-moisture settings. Engineered to ASME B18.21.1 standards, these washers ensure dimensional consistency and reliable performance in critical fastening systems, making them ideal for structural steel connections, industrial equipment maintenance, and infrastructure projects requiring long-term corrosion resistance.

Specification Summary & Compliance

This USS flat washer features precise dimensional specifications including 2.125" inner diameter, 4.5" outer diameter, and thickness range of 0.153-0.213" designed for 2" screw sizes. Manufactured in compliance with ASME B18.21.1 standards for dimensional accuracy and performance requirements. The product meets RoHS 3 (2015/863/EU) compliance for environmental safety and is constructed from hot-dipped galvanized steel for enhanced corrosion protection in industrial applications.