S-98970A143 1.625" ID x 3.5" 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 thanks to 3.5" outer diameter that prevents surface damage and maintains joint integrity
• Precise compatibility with 1 1/2" screws through 1.625" inner diameter for secure fastening applications
• Industry-standard compliance with ASME B18.21.1 specifications ensuring reliable performance and interchangeability
• Environmental responsibility with RoHS 3 compliance meeting strict regulatory requirements for hazardous substances
• Robust construction with 0.153-0.213" thickness providing excellent stability and vibration resistance
• Dimensional accuracy in inch system measurements for seamless integration with existing industrial equipment

Professional Applications & Engineering Value

This USS flat washer delivers exceptional engineering value in demanding industrial environments where corrosion and structural integrity are critical concerns. The hot-dipped galvanized steel construction provides a thick, durable zinc coating that offers superior protection against rust and environmental degradation, significantly extending service life in outdoor applications, marine environments, and chemical processing facilities. The substantial 3.5" outer diameter effectively distributes clamping force over a wider surface area, preventing material deformation and maintaining joint integrity under heavy loads and vibration. Engineered to ASME B18.21.1 standards, this heavy-duty flat washer ensures reliable performance in structural steel connections, machinery assembly, and construction applications where consistent dimensional accuracy and compliance with industry specifications are essential for safety and longevity.

Specification Summary & Compliance

This USS flat washer features precise dimensional specifications with 1.625" inner diameter, 3.5" outer diameter, and thickness ranging from 0.153" to 0.213" designed specifically for use with 1 1/2" screw sizes. Manufactured in compliance with ASME B18.21.1 standards for dimensional consistency and performance reliability. The product meets RoHS 3 (2015/863/EU) compliance requirements, ensuring environmental responsibility and regulatory adherence for industrial applications worldwide.