S-90313A109 0.281" ID x 1.5" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance from 18-8 stainless steel construction, ideal for humid or chemically aggressive environments
• Precise dimensional fit with 0.281" ID ensuring secure seating on 1/4" screws without play or misalignment
• Optimal load distribution through large 1.5" OD design, minimizing surface pressure and material deformation
• Consistent performance guaranteed by controlled thickness range (0.055-0.069") for uniform clamping force
• Environmental compliance meeting RoHS 3 and REACH standards, safe for regulated industries
• Durable mechanical properties of 18-8 stainless steel providing long-term reliability in repetitive assembly operations
• Broad industrial compatibility with inch-system fasteners across manufacturing, construction, and equipment maintenance

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these 18-8 stainless steel flat washers solve critical assembly challenges where corrosion resistance and dimensional stability are paramount. The precise 0.281" ID ensures perfect alignment with 1/4" screws, eliminating installation errors while the generous 1.5" OD distributes clamping force effectively across softer materials or painted surfaces. Manufactured to inch-system standards, these precision washers prevent galvanic corrosion in mixed-material assemblies and maintain integrity in outdoor equipment, food processing machinery, and marine applications where moisture exposure would compromise ordinary fasteners.

Specification Summary & Compliance

This flat washer features inch-system dimensions with 0.281" internal diameter, 1.5" outer diameter, and thickness ranging 0.055-0.069" for consistent performance in 1/4" screw applications. Manufactured from 18-8 stainless steel for optimal corrosion resistance, the product complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring safe use across regulated industries including electronics, automotive, and industrial equipment manufacturing.