S-90850A250 0.474" ID x 0.937" OD General Purpose Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc yellow-chromate plating, extending service life in harsh industrial environments
• Exceptional load distribution from precise 0.474" ID and 0.937" OD dimensions, preventing surface damage and joint failure
• High-strength performance meeting Grade 9 standards, ensuring reliability under extreme mechanical stress
• Enhanced durability with Rockwell C40 hardness, maintaining structural integrity through repeated use
• Regulatory compliance assurance with REACH (EC 1907/2006) adherence, meeting international safety standards
• Optimal fit and function designed specifically for 7/16" screws, reducing installation errors and improving assembly efficiency
• Consistent thickness control between 0.090-0.112", providing uniform pressure distribution and vibration resistance

Professional Applications & Engineering Value

Engineered for demanding industrial applications, these Grade 9 flat washers deliver critical performance where standard washers fail. The zinc yellow-chromate plated steel construction provides superior protection against corrosion in outdoor, chemical, and high-moisture environments, significantly reducing maintenance costs and downtime. With Rockwell C40 hardness and precise dimensional tolerances, these washers maintain clamping force under extreme vibration and thermal cycling, preventing loosening in heavy machinery, structural steel connections, and automotive assemblies. The inch system measurement ensures compatibility with North American equipment specifications, while the optimized 7/16" screw size matching eliminates guesswork during installation. These heavy-duty washers solve common engineering challenges including surface marring, joint fatigue, and corrosion-induced failure in critical fastening systems.

Specification Summary & Compliance

Manufactured to exacting standards with 0.474" inner diameter and 0.937" outer diameter dimensions, ensuring precise fit with 7/16" fasteners. Thickness maintained within 0.090-0.112" tolerance range for consistent performance. Meets Grade 9 strength classification requirements for high-stress applications. Material certification includes REACH (EC 1907/2006) compliance as of June 14, 2023, addressing 235 SVHC substances. Zinc yellow-chromate plating provides corrosion protection while maintaining Rockwell C40 hardness specifications. Suitable for use in accordance with ASME/ANSI standards for industrial fastener applications.