S-90313A309 0.281" ID x 3" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance thanks to 18-8 stainless steel construction, ideal for harsh industrial environments
• Exceptional load distribution with a large 3" outer diameter, minimizing surface pressure and preventing material damage
• Precise fit for 1/4" screws ensured by the 0.281" inner diameter, providing secure fastening and reducing assembly errors
• Durable mechanical performance with a thickness range of 0.051-0.080", offering reliable service in demanding applications
• Long-term environmental compliance with RoHS 3 and REACH standards, ensuring safe use in regulated industries
• Broad compatibility with inch-system components, simplifying sourcing and inventory for North American operations
• Cost-effective maintenance due to stainless steel's longevity, reducing replacement frequency and total cost of ownership

Professional Applications & Engineering Value

This 18-8 stainless steel flat washer delivers critical engineering value in industrial settings where corrosion resistance and load distribution are paramount. The 3" OD and 0.281" ID work in tandem to provide a stable bearing surface for 1/4" screws, effectively preventing joint loosening and surface indentation under vibration or thermal cycling. In applications like heavy machinery, structural assemblies, and outdoor equipment, the washer's stainless steel composition combats rust and chemical exposure, extending service life. Its precise inch-system dimensions ensure seamless integration with standard fasteners, streamlining assembly processes while meeting the durability demands of industrial washers in corrosive or high-stress environments.

Specification Summary & Compliance

This flat washer conforms to standard inch measurement specifications with an inner diameter of 0.281", outer diameter of 3", and thickness range of 0.051-0.080", designed specifically for use with 1/4" screw sizes. The product is manufactured from 18-8 stainless steel and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to environmental and safety standards for industrial components.