S-98026A030 0.375" ID x 0.875" OD ASME B18.21.1 Oversized Washers

Key Features & Benefits at a Glance

• Exceptional load distribution with 0.875" outer diameter to prevent surface damage and maintain joint integrity under heavy loads
• Superior corrosion resistance through zinc yellow-chromate plating that protects against rust in harsh industrial environments
• Maximum strength reliability with Grade 8 classification and Rockwell C38 hardness for demanding applications
• Precise dimensional fit featuring 0.375" inner diameter specifically engineered for 5/16" screw sizes
• Enhanced durability with consistent thickness (0.064-0.104") ensuring uniform pressure distribution
• Regulatory compliance assurance meeting both ASME B18.21.1 standards and REACH environmental requirements
• Versatile industrial application as USS-designated flat washers suitable for various heavy-duty fastening systems

Professional Applications & Engineering Value

These Grade 8 USS flat washers deliver critical engineering solutions for industrial applications where vibration resistance and long-term reliability are paramount. The zinc yellow-chromate plated steel construction provides exceptional corrosion protection in demanding environments such as construction equipment, automotive assemblies, and heavy machinery. Engineered to ASME B18.21.1 specifications, these washers effectively distribute clamping force across a wider surface area, preventing joint loosening and material deformation. The Rockwell C38 hardness ensures maintained performance under extreme pressure, while the precise 5/16" sizing guarantees perfect compatibility with corresponding fasteners, reducing installation time and improving overall assembly integrity in critical heavy-duty applications.

Specification Summary & Compliance

Manufactured to exact USS flat washer dimensions with 0.375" inner diameter, 0.875" outer diameter, and thickness range of 0.064-0.104". These washers meet ASME B18.21.1 dimensional and material specifications, ensuring interchangeability and reliable performance. The Grade 8 classification confirms high tensile strength capabilities, while the Rockwell C38 hardness rating guarantees consistent material properties. Fully compliant with REACH regulations (EC 1907/2006) regarding substance restrictions, making them suitable for various industrial markets with strict environmental requirements.