S-98023A053 2" ID x 4.25" OD ASME B18.21.1 SAE Washers

Key Features & Benefits at a Glance

• Superior corrosion protection with zinc yellow-chromate plating, extending service life in harsh industrial environments
• Exceptional load distribution from the large 4.25" OD, preventing surface damage and joint loosening under heavy loads
• High-strength Grade 8 performance with Rockwell C38 hardness, ensuring reliable performance in demanding applications
• Precise fit for 1 7/8" screws with accurate 2" ID, providing secure fastening and vibration resistance
• Compliance with ASME B18.21.1 standards, guaranteeing dimensional accuracy and interchangeability
• REACH regulation compliance, ensuring safe use and environmental responsibility in industrial settings
• Durable steel construction with consistent 0.153-0.213" thickness, offering long-term reliability and repeated use capability

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, these Grade 8 flat washers solve critical engineering challenges in construction, machinery assembly, and structural fastening. The zinc yellow-chromate plated steel construction provides superior corrosion resistance, making them ideal for outdoor equipment, marine environments, and chemical processing facilities where moisture and corrosive elements are present. With Rockwell C38 hardness and SAE designation, these washers maintain integrity under extreme pressure and vibration, preventing joint failure in high-load applications. The precise 2" ID ensures perfect compatibility with 1 7/8" screws, while the large 4.25" OD distributes clamping force effectively across surfaces, protecting delicate materials and preventing embedding. These ASME B18.21.1 compliant washers deliver consistent performance in automotive, aerospace, and heavy equipment maintenance where reliability is non-negotiable.

Specification Summary & Compliance

This SAE flat washer features precise dimensional specifications including 2" internal diameter, 4.25" outer diameter, and thickness ranging 0.153-0.213". Manufactured to ASME B18.21.1 standards for dimensional accuracy and mechanical properties, with Grade 8 strength classification and Rockwell C38 hardness verification. The product is fully REACH compliant (EC 1907/2006) as of June 14, 2023, containing no Substances of Very High Concern above threshold limits, ensuring regulatory compliance for industrial use across global markets.