S-90850A350 0.661" ID x 1.342" OD General Purpose Washers

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with zinc yellow-chromate plating for long-lasting performance in harsh industrial environments
• Superior load distribution with precise 0.661" ID and 1.342" OD dimensions to prevent surface damage and maintain joint integrity
• High-strength Grade 9 classification ensures reliable performance under heavy loads and extreme conditions
• Enhanced durability with Rockwell C40 hardness rating for excellent wear resistance and extended service life
• Comprehensive environmental compliance meeting both RoHS 3 and REACH standards for global industrial applications
• Optimal screw compatibility specifically engineered for 5/8" fasteners to ensure perfect fit and function
• Consistent thickness tolerance (0.146-0.174") for uniform pressure distribution and reliable assembly performance

Professional Applications & Engineering Value

This Grade 9 flat washer delivers exceptional engineering value through its zinc yellow-chromate plated steel construction, specifically designed to address common industrial challenges. The advanced surface treatment provides superior corrosion resistance, making it ideal for applications exposed to moisture, chemicals, and outdoor elements. With Rockwell C40 hardness and precise dimensional control, this heavy-duty washer effectively prevents bolt loosening, distributes clamping forces evenly, and protects sensitive surfaces from damage. Engineers specify this 5/8 inch flat washer for critical applications in construction, heavy machinery, automotive assemblies, and industrial equipment where high strength washers are essential for maintaining structural integrity and preventing joint failure under vibration and dynamic loads.

Specification Summary & Compliance

This flat washer features precise inch system dimensions with 0.661" inner diameter and 1.342" outer diameter, maintaining tight thickness tolerances between 0.146-0.174". Manufactured to Grade 9 strength classification standards, it ensures consistent performance in demanding applications. The product fully complies with RoHS 3 (2015/863/EU) regulations and REACH (EC 1907/2006) requirements, including the latest SVHC updates as of June 14, 2023. This comprehensive compliance makes the washer suitable for global industrial markets requiring environmentally responsible fastener solutions.