S-98970A175 0.938" ID x 3" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion protection with hot-dipped galvanized steel coating, extending service life in harsh environments
• Exceptional load distribution thanks to the large 3" outer diameter, preventing surface damage and joint loosening
• Precise compatibility with 7/8" screws through the 0.938" inner diameter, ensuring secure and accurate fit
• Enhanced durability from Rockwell B40 hardness, resisting deformation under high pressure and repeated use
• Reliable thickness range of 0.235-0.265" for consistent performance and vibration resistance in heavy-duty applications
• Full regulatory compliance with RoHS 3 and REACH standards, meeting global environmental and safety requirements
• Versatile inch system sizing for seamless integration with existing industrial equipment and fastening systems

Professional Applications & Engineering Value

This hot-dipped galvanized steel flat washer delivers critical engineering value by addressing common industrial fastening challenges. The heavy-duty construction and corrosion-resistant coating make it ideal for outdoor structures, marine equipment, and chemical processing facilities where moisture and corrosive elements threaten fastener integrity. The substantial 3" outer diameter distributes clamping force effectively across wider surfaces, preventing material crushing in wood, composite, or soft metal applications. With precise 0.938" inner diameter matching standard 7/8" screw sizes, it eliminates play and maintains alignment in high-vibration environments like machinery bases, conveyor systems, and structural steel connections. The combination of Rockwell B40 hardness and consistent thickness ensures reliable performance in critical load-bearing assemblies.

Specification Summary & Compliance

This flat washer features inch system dimensions with 3" OD and 0.938" ID specifically engineered for 7/8" screw sizes. The thickness is maintained within 0.235-0.265" tolerance for uniform performance. 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 is fully REACH (EC 1907/2006) compliant with the latest SVHC updates as of 01/17/2023.