S-90850A200 0.411" ID x 0.827" OD General Purpose Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc yellow-chromate plating for extended service life in harsh industrial environments
• Exceptional load distribution thanks to precise 0.411" ID x 0.827" OD dimensions that prevent surface damage and joint loosening
• High-strength Grade 9 performance ensuring reliable performance in demanding applications requiring heavy-duty fastening
• Consistent thickness control (0.090-0.112") for uniform pressure distribution and improved assembly reliability
• Enhanced durability with Rockwell C40 hardness that maintains structural integrity under repeated stress
• Perfect fit for 3/8" screws providing secure fastening without slippage or misalignment
• Regulatory compliance assurance with REACH compliance meeting strict industrial chemical safety standards

Professional Applications & Engineering Value

This Grade 9 flat washer delivers critical engineering solutions where corrosion resistance and structural integrity are paramount. The zinc yellow-chromate plated steel construction provides exceptional protection against rust and chemical exposure, making it ideal for outdoor equipment, marine applications, and industrial machinery exposed to moisture or corrosive agents. The precise dimensional control ensures optimal load distribution across joint surfaces, preventing material deformation and maintaining bolt tension in heavy-duty applications. With its Rockwell C40 hardness, this washer maintains its structural properties under vibration and dynamic loads, reducing maintenance frequency and downtime in critical assembly operations. The inch system compatibility makes it perfectly suited for North American industrial standards and replacement part programs.

Specification Summary & Compliance

Manufactured to precise dimensional tolerances with internal diameter of 0.411" and outer diameter of 0.827" for perfect compatibility with 3/8" fasteners. Thickness maintained between 0.090-0.112" for consistent performance. Constructed from zinc yellow-chromate plated steel with Rockwell C40 hardness and certified to Grade 9 strength classification. Fully compliant with REACH (EC 1907/2006) regulations (06/14/2023, 235 SVHC) for industrial chemical safety standards.