S-93413A319 0.938" ID x 2.25" OD ASME B18.21.1 Oversized Washers

Key Features & Benefits at a Glance

• Exceptional load distribution with 2.25" outer diameter to prevent surface damage and material embedment
• Superior corrosion resistance through black protective coating for extended service life in harsh environments
• High-strength Grade 8 performance with Rockwell C38 hardness for demanding mechanical applications
• Precision dimensional control with 7/8" inner diameter ensuring perfect fastener alignment
• Industry-standard compliance meeting ASME B18.21.1 specifications for reliable performance
• Environmental regulation adherence with RoHS 3 and REACH compliance for global supply chain compatibility
• Consistent thickness tolerance (0.235-0.265") for uniform clamping force and vibration resistance

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, this Grade 8 USS flat washer delivers critical performance in construction, machinery assembly, and structural fastening systems. The black corrosion-resistant coated steel construction provides essential protection against rust and environmental degradation, significantly extending service intervals in outdoor or corrosive environments. With its 7/8" inner diameter precisely matching standard fastener sizes and 2.25" outer diameter distributing load effectively, this washer prevents joint loosening and surface damage under high vibration conditions. The Rockwell C38 hardness ensures maintained flatness and structural integrity under extreme pressure, making it ideal for critical connections in heavy equipment, structural steel frameworks, and industrial machinery where failure is not an option.

Specification Summary & Compliance

This USS flat washer conforms to ASME B18.21.1 dimensional standards with precise inch system measurements: 7/8" ID, 2.25" OD, and thickness range of 0.235-0.265". Manufactured from Grade 8 steel with Rockwell C38 hardness verification, it meets rigorous mechanical property requirements. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental responsibility and global market acceptance for industrial fastener applications.