S-90850A110 0.599" ID x 1.186" OD ASME B18.21.1 General Purpose Washers

Key Features & Benefits at a Glance

• Superior load distribution with 1.186" outer diameter to prevent surface damage and joint loosening under high stress
• Exceptional corrosion resistance through zinc yellow-chromate plating that withstands harsh industrial environments
• Maximum mechanical strength with Grade 9 classification and Rockwell C40 hardness for heavy-duty applications
• Precise dimensional accuracy with 9/16" inner diameter ensuring perfect fit for standard fastener systems
• Reliable compliance with ASME B18.21.1 specifications for consistent performance and interchangeability
• Environmental responsibility through REACH compliance, ensuring safe use in regulated industries
• Optimized thickness range (0.090-0.112") providing ideal compression characteristics and vibration resistance

Professional Applications & Engineering Value

This Grade 9 SAE flat washer delivers critical engineering solutions where standard washers fail. The zinc yellow-chromate plated steel construction provides superior corrosion resistance in demanding environments like outdoor machinery, automotive assemblies, and industrial equipment. With its 9/16" inner diameter and 1.186" outer diameter, it effectively distributes clamping force across a wider surface area, preventing material deformation and maintaining bolt preload in high-vibration applications. The Rockwell C40 hardness ensures the washer maintains its structural integrity under extreme pressure, while the ASME B18.21.1 compliance guarantees dimensional precision for reliable installation and long-term performance in critical fastening systems.

Specification Summary & Compliance

This heavy-duty flat washer features precision inch dimensions with 0.599" ID, 1.186" OD, and thickness ranging 0.090-0.112". Manufactured from zinc yellow-chromate plated steel with Rockwell C40 hardness, it meets Grade 9 strength requirements and complies with ASME B18.21.1 standards for dimensional accuracy and performance. The product is fully REACH compliant (EC 1907/2006) as of June 14, 2023, containing no substances of very high concern from the 235 SVHC list, ensuring environmental responsibility and regulatory adherence for industrial applications.