S-98970A332 3.125" ID x 5.5" OD ASME B18.21.1 USS Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with hot-dipped galvanized steel construction for extended service life in harsh environments
• Heavy-duty load distribution with 5.5" OD providing excellent surface coverage for 3" screw applications
• Precise dimensional compatibility with 3.125" ID ensuring perfect fit and alignment with standard fasteners
• Enhanced durability with thickness ranging from 0.249" to 0.327" for reliable performance under heavy loads
• Industry-standard compliance meeting ASME B18.21.1 specifications for consistent quality and interchangeability
• Environmental responsibility with RoHS 3 compliance for safe use in regulated applications
• Versatile inch system compatibility designed for seamless integration with existing industrial equipment and assemblies

Professional Applications & Engineering Value

This hot-dipped galvanized steel USS flat washer delivers exceptional engineering value through its robust construction and protective coating. The heavy-duty flat washer design addresses critical industrial challenges by preventing corrosion-induced failure in outdoor structures, marine applications, and chemical processing facilities. The zinc coating provides sacrificial protection that significantly extends service life, reducing maintenance frequency and replacement costs. With its ASME B18.21.1 compliance, engineers can trust consistent performance in construction, heavy machinery, and infrastructure projects where 3" screw applications require reliable load distribution and weather resistance. The substantial outer diameter ensures optimal pressure distribution across connected surfaces, preventing material deformation and maintaining joint integrity under vibration and dynamic loads.

Specification Summary & Compliance

This USS flat washer features precise dimensions of 3.125" inner diameter and 5.5" outer diameter with thickness tolerance of 0.249-0.327". Manufactured from hot-dipped galvanized steel in the inch measurement system, the product strictly adheres to ASME B18.21.1 standards for dimensional accuracy and performance requirements. The washer is RoHS 3 (2015/863/EU) compliant, ensuring environmental safety and regulatory acceptance for industrial applications worldwide.