S-90785A031 0.39" ID x 1" OD General Purpose Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance from 400 Nickel material, ensuring long-term reliability in harsh industrial environments
• Exceptional durability with Rockwell C45 hardness, providing excellent wear resistance and load distribution
• Precise dimensional fit with 0.39" ID specifically engineered for 3/8" screws, preventing loosening and ensuring secure fastening
• Optimal surface coverage with 1" OD design, distributing pressure effectively and protecting sensitive surfaces
• Consistent performance through controlled thickness (0.054-0.068"), maintaining uniform clamping force in assembly applications
• Regulatory compliance assurance with RoHS 3 and REACH certification, meeting strict environmental and safety standards
• Inch system compatibility for seamless integration with existing industrial equipment and standard fastening systems

Professional Applications & Engineering Value

These 400 Nickel flat washers deliver exceptional engineering value in demanding industrial applications where corrosion resistance and mechanical strength are critical. The nickel composition provides outstanding protection against oxidation and chemical degradation, making these washers ideal for marine environments, chemical processing equipment, and outdoor installations. The Rockwell C45 hardness ensures the washers maintain their structural integrity under heavy loads and vibration, preventing deformation and maintaining consistent clamping force. With precise 0.39" ID sizing for 3/8" screws, these components eliminate play and misalignment in assembly, while the generous 1" OD provides optimal load distribution across connected surfaces. The controlled thickness range (0.054-0.068") guarantees uniform performance in automated assembly lines and precision engineering applications.

Specification Summary & Compliance

This flat washer features precise inch system dimensions with 0.39" inner diameter, 1" outer diameter, and thickness ranging from 0.054" to 0.068" for consistent performance in 3/8" screw applications. Manufactured from 400 Nickel material with Rockwell C45 hardness for superior mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) standards and REACH (EC 1907/2006) regulations (updated January 17, 2023, covering 233 SVHC substances), ensuring environmental responsibility and regulatory acceptance in global markets.