S-98970A125 0.688" ID x 3" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion protection through hot-dipped galvanized steel coating for extended service life in harsh environments
• Optimal load distribution with 3" outer diameter providing excellent surface coverage for 5/8" screw applications
• Precise fit and alignment with 0.688" inner diameter ensuring secure fastening without slippage
• Consistent performance maintained by Rockwell B40 hardness for reliable mechanical strength
• Regulatory compliance assurance with full RoHS 3 and REACH compliance for international industrial use
• Dimensional stability with controlled thickness range (0.235-0.265") for uniform pressure distribution
• Heavy-duty construction designed to withstand high-stress applications in construction and mechanical assemblies

Professional Applications & Engineering Value

This hot-dipped galvanized steel flat washer addresses critical engineering challenges in industrial fastening systems where corrosion resistance and load distribution are paramount. The heavy-duty construction with precise 0.688" ID ensures perfect compatibility with 5/8" screws, preventing loosening under vibration while the substantial 3" OD effectively distributes clamping force across wider surfaces. The galvanized coating provides exceptional protection against rust and environmental degradation, making these industrial washers ideal for outdoor construction, marine applications, and mechanical assemblies exposed to moisture or chemicals. The combination of Rockwell B40 hardness and controlled thickness specifications ensures consistent performance in high-stress applications, reducing maintenance frequency and extending equipment service life.

Specification Summary & Compliance

This flat washer features inch system dimensions with 0.688" inner diameter, 3" outer diameter, and thickness ranging 0.235-0.265" specifically engineered for 5/8" screw applications. Manufactured from hot-dipped galvanized steel with Rockwell B40 hardness rating, the product maintains dimensional accuracy per standard industrial tolerances. Full compliance with RoHS 3 (2015/863/EU) compliant with exemption 6(a) for lead as an alloying element in steel and REACH (EC 1907/2006) (01/17/2023, 233 SVHC) ensures regulatory adherence for global industrial distribution and use.