S-91090A127 0.344" ID x 2" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance from zinc-plated steel construction, extending service life in harsh industrial environments
• Optimal load distribution with precise 2" outer diameter, preventing surface damage and maintaining joint integrity
• Perfect compatibility with 5/16" screws thanks to accurate 0.344" inner diameter sizing
• Consistent performance ensured by controlled thickness variation (0.043-0.051") for uniform pressure application
• Environmental compliance meeting RoHS 3 and REACH standards for safe, sustainable operations
• Enhanced durability through zinc-plated steel material, providing reliable protection against wear and degradation
• Versatile inch-system compatibility designed for seamless integration with standard industrial equipment and assemblies

Professional Applications & Engineering Value

This zinc-plated steel flat washer delivers critical engineering solutions where corrosion resistance and load distribution are paramount. The zinc plating creates a protective barrier against moisture and chemicals, significantly reducing failure risks in outdoor, marine, or chemical processing applications. With its substantial 2" outer diameter, it effectively spreads clamping force over wider surfaces, preventing embedment in soft materials and maintaining structural integrity in high-vibration environments. The precise 0.344" inner diameter ensures perfect alignment with 5/16" screws, eliminating installation issues while the controlled thickness provides consistent seating pressure. These flat washers are engineered to solve common industrial challenges including joint loosening, surface damage, and premature corrosion failure.

Specification Summary & Compliance

This industrial flat washer features inch-system dimensions with 0.344" ID and 2" OD, manufactured to standard industrial tolerances with thickness ranging 0.043-0.051". The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, containing no restricted substances above threshold limits. Designed specifically for use with 5/16" screws, this zinc-plated steel washer meets industry standards for corrosion protection and mechanical performance in demanding applications.