S-91090A113 0.281" ID x 1.5" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion protection with zinc-plated steel construction for extended service life in demanding environments
• Precise dimensional fit with 0.281" ID specifically engineered for 1/4" screws to prevent loosening and ensure secure fastening
• Optimal load distribution provided by the large 1.5" OD design, reducing surface pressure and preventing material damage
• Consistent performance guaranteed by controlled thickness range (0.042-0.051") for uniform compression and reliable sealing
• Global compliance assurance meeting RoHS 3 and REACH environmental standards for international industrial applications
• Durable steel core offering excellent strength and longevity for heavy-duty mechanical assemblies
• Inch system compatibility ensuring seamless integration with existing imperial measurement equipment and specifications

Professional Applications & Engineering Value

This zinc-plated steel flat washer delivers critical engineering solutions for industrial applications where corrosion resistance and dimensional precision are paramount. The 0.281" ID provides exact compatibility with 1/4" screws, eliminating play and maintaining joint integrity in vibrating machinery. The substantial 1.5" OD effectively distributes clamping force across wider surfaces, preventing embedding in soft materials and reducing stress concentration in structural assemblies. Manufactured from robust steel with protective zinc plating, these flat washers withstand harsh environmental conditions while maintaining their protective and load-bearing functions in automotive, construction, and manufacturing equipment where reliable industrial washers are essential for safety and performance.

Specification Summary & Compliance

This precision flat washer features exact inch system dimensions with 0.281" inner diameter, 1.5" outer diameter, and thickness ranging 0.042-0.051" for consistent performance with 1/4" fasteners. The product fully complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe usage in global industrial markets. Manufactured to standard flat washer specifications using zinc-plated steel for optimal corrosion resistance and mechanical durability.