S-90481A283 0.938" ID x 2.5" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, extending service life in demanding environments
• Optimal load distribution thanks to the large 2.5" outer diameter, preventing surface damage and joint loosening
• Precise fit for 7/8" screws with 0.938" inner diameter, ensuring secure fastening and reducing installation errors
• Versatile thickness range (0.108-0.160") accommodates slight variations and provides consistent performance under compression
• Heavy-duty durability from steel material, capable of withstanding high-stress industrial applications
• Full regulatory compliance with RoHS 3 and REACH, ensuring safe use in global markets and sensitive industries
• Reliable inch system sizing for seamless integration with standard imperial fastener assemblies

Professional Applications & Engineering Value

This zinc-plated steel flat washer delivers critical engineering value by solving common industrial fastening challenges. The zinc plating provides a sacrificial layer that actively resists corrosion, making it ideal for outdoor equipment, machinery, and construction applications where moisture exposure is a concern. The generous 2.5" OD creates a wide bearing surface that effectively distributes clamping force, preventing embedment into soft materials and maintaining bolt preload in vibrating systems. Engineered specifically for 7/8" screw size applications, this washer ensures proper alignment and reduces stress concentration points that lead to fastener failure. Its robust steel construction maintains integrity under heavy loads, while the precise dimensional tolerances guarantee consistent performance in automated assembly lines and structural connections.

Specification Summary & Compliance

This flat washer features inch system dimensions with 0.938" inner diameter, 2.5" outer diameter, and thickness ranging from 0.108" to 0.160" for compatibility with 7/8" screw sizes. Manufactured to standard flat washer specifications, it provides reliable performance in general industrial applications. The product is fully compliant with RoHS 3 (2015/863/EU) regulations and REACH (EC 1907/2006) requirements as of June 14, 2023, containing no substances of very high concern above threshold limits, making it suitable for use in regulated industries and international markets.