S-98970A234 2.75" ID x 4.5" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with hot-dipped galvanized steel coating, extending service life in harsh environments
• Exceptional load distribution with 4.5" OD and 2.75" ID, preventing surface damage and maintaining joint integrity
• Enhanced durability from Rockwell B40 hardness, resisting deformation under heavy loads
• Precision thickness control (0.302-0.332") ensures consistent performance and reliable spacing
• Perfect compatibility with 2 1/2" screw sizes, reducing installation errors and improving assembly efficiency
• Full regulatory compliance with RoHS 3 and REACH standards, meeting international environmental and safety requirements
• Heavy-duty construction ideal for demanding mechanical and structural applications

Professional Applications & Engineering Value

This hot-dipped galvanized steel flat washer delivers critical engineering solutions for industrial applications where corrosion resistance and structural integrity are paramount. The heavy-duty construction with precise 2.75" ID and 4.5" OD dimensions provides optimal load distribution, preventing surface crushing and maintaining bolt tension in structural steel connections, heavy machinery assemblies, and outdoor construction projects. The galvanized coating creates a sacrificial barrier against moisture, chemicals, and environmental exposure, significantly extending service life in demanding conditions. Engineered for 2 1/2" screw sizes in inch system applications, these washers ensure proper fitment while the controlled thickness variation guarantees consistent performance across multiple fastener points in critical assemblies.

Specification Summary & Compliance

This flat washer features inch system dimensions with 2.75" inner diameter, 4.5" outer diameter, and thickness ranging 0.302-0.332" for precision fitment. Manufactured from hot-dipped galvanized steel with Rockwell B40 hardness rating, it complies with RoHS 3 (2015/863/EU) under exemption 6(a) for lead as an alloying element in steel and meets REACH (EC 1907/2006) compliance standards as of January 17, 2023, addressing 233 Substances of Very High Concern.