S-90850A400 0.819" ID x 1.499" OD General Purpose Washers

Key Features & Benefits at a Glance

• Exceptional Load Distribution with 1.499" OD and 0.819" ID for superior surface coverage, reducing stress and preventing joint failure
• High-Strength Grade 9 Performance ensures reliable performance in demanding applications where fastener integrity is critical
• Enhanced Corrosion Resistance from zinc yellow-chromate plating protects against rust and extends service life in harsh environments
• Rockwell C40 Hardness provides excellent durability and resistance to deformation under heavy loads
• Precision Inch System Compatibility designed specifically for 3/4" screw sizes with consistent dimensional accuracy
• Regulatory Compliance Assurance meets RoHS 3 and REACH standards for safe, environmentally responsible industrial use
• Optimized Thickness Range (0.146-0.174") ensures proper compression and vibration resistance in assembled components

Professional Applications & Engineering Value

This Grade 9 flat washer delivers critical engineering solutions for heavy-duty industrial applications where fastener failure is not an option. The zinc yellow-chromate plated steel construction provides superior corrosion resistance in demanding environments including manufacturing equipment, structural assemblies, and machinery subjected to vibration and dynamic loads. With its Rockwell C40 hardness and precise dimensional specifications, this washer maintains clamping force integrity while preventing surface damage to connected materials. The optimized 3/4" screw size compatibility and inch system measurements ensure seamless integration into existing industrial fastening systems, making it an essential component for maintenance, repair, and OEM applications requiring high-strength fastener performance and long-term reliability.

Specification Summary & Compliance

This flat washer features precision inch system dimensions with 0.819" ID, 1.499" OD, and thickness range of 0.146-0.174" for consistent performance. Manufactured to Grade 9 strength classification with Rockwell C40 hardness rating, it meets industry standards for high-strength fasteners. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental responsibility and workplace safety. The zinc yellow-chromate plating provides standardized corrosion protection while maintaining dimensional stability across industrial applications.