S-91090A110 0.328" ID x 0.625" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, extending service life in demanding industrial environments
• Precise dimensional fit with 0.328" ID and 0.625" OD ensuring reliable performance with 5/16" fasteners
• Optimal load distribution through controlled thickness (0.042-0.051") to prevent surface damage and joint failure
• Environmental compliance assurance meeting RoHS 3 and REACH standards for safe global industrial use
• Enhanced mechanical stability through flat washer design that maintains bolt tension and reduces loosening
• Broad compatibility with inch-system applications across multiple industrial sectors

Professional Applications & Engineering Value

This zinc-plated steel flat washer delivers critical engineering solutions where corrosion resistance and dimensional precision are paramount. The zinc plating provides sacrificial protection against rust and oxidation, significantly extending component life in humid or chemically aggressive environments. With its precise 0.328" inner diameter and 0.625" outer diameter, this 5/16" flat washer ensures perfect fitment with standard fasteners while distributing clamp load effectively to prevent surface indentation and joint fatigue. Ideal for industrial assembly, machinery maintenance, and construction applications, these washers solve common challenges of fastener loosening and material degradation while maintaining compliance with international environmental regulations.

Specification Summary & Compliance

Manufactured to standard inch dimensions with 0.328" ID and 0.625" OD, this flat washer maintains precise thickness between 0.042-0.051" for consistent performance. The product fully complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and unrestricted use across global industrial markets. Designed specifically for 5/16" screw size applications, these zinc-plated steel washers provide reliable mechanical performance without hardness rating requirements for general purpose use.