S-98970A331 2.875" ID x 5.25" OD ASME B18.21.1 USS Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance through hot-dipped galvanized steel construction, extending service life in harsh environments
• Exceptional load distribution with 5.25" OD and 0.228-0.310" thickness, preventing surface damage and joint loosening
• Precise compatibility with 2 3/4" screw sizes, ensuring secure fastening in heavy-duty applications
• Industry-standard compliance with ASME B18.21.1 specifications, guaranteeing dimensional accuracy and performance reliability
• Environmental regulation adherence with RoHS 3 compliance, meeting modern manufacturing safety requirements
• Robust mechanical performance from inch-system manufacturing, providing consistent quality in industrial settings
• Versatile application readiness with USS designation, suitable for construction and mechanical assemblies

Professional Applications & Engineering Value

This USS flat washer delivers critical engineering solutions through its hot-dipped galvanized steel construction and substantial dimensions. The 2.875" ID perfectly accommodates 2 3/4" fasteners while the 5.25" OD provides exceptional bearing surface, effectively distributing clamp load to prevent material crushing and joint failure. The galvanized surface treatment offers superior protection against rust and corrosion in outdoor construction, marine environments, and industrial applications where moisture exposure is common. Meeting ASME B18.21.1 standards, this washer ensures dimensional consistency and mechanical reliability in structural connections, bridge construction, heavy equipment assembly, and infrastructure projects requiring durable, corrosion-resistant fastening components.

Specification Summary & Compliance

This USS flat washer features precise dimensional specifications with 2.875" inner diameter, 5.25" outer diameter, and thickness ranging 0.228-0.310". Manufactured to ASME B18.21.1 standards for dimensional accuracy and mechanical properties, it's specifically designed for 2 3/4" screw sizes in inch system applications. The product maintains RoHS 3 (2015/863/EU) compliance for environmental safety and is constructed from hot-dipped galvanized steel for enhanced corrosion protection in demanding industrial environments.