S-90474A118 0.531" ID x 1.75" OD ASME B18.21.1 ASME Washers

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with zinc yellow-chromate plating, extending service life in harsh industrial environments
• Superior load distribution across a 1.75" OD surface, preventing surface damage and fastener loosening under high stress
• High-strength Grade 8 performance with Rockwell C38 hardness, ensuring reliable performance in heavy-duty applications
• Precise dimensional fit with 1/2" ID, providing secure seating for 1/2" screws and reducing installation errors
• Compliance with ASME B18.21.1 standards, guaranteeing consistent quality and interchangeability in industrial assemblies
• Environmental regulation adherence with RoHS 3 and REACH compliance, meeting global sustainability requirements
• Durable steel construction with thickness ranging 0.090-0.112", offering long-term reliability and vibration resistance

Professional Applications & Engineering Value

Engineered for demanding industrial settings, these Grade 8 flat washers address critical challenges in machinery assembly, structural fastening, and heavy equipment maintenance. The zinc yellow-chromate plated steel construction combats oxidation and chemical exposure, while the 1/2" ID x 1.75" OD dimensions optimize load distribution to prevent joint failure and surface indentation. With Rockwell C38 hardness, they maintain integrity under extreme pressure, making them ideal for construction, automotive, and manufacturing applications where ASME B18.21.1 compliance ensures seamless integration with standard inch-system components.

Specification Summary & Compliance

This washer meets dimensional and material specifications per ASME B18.21.1 for inch-system flat washers, with an internal diameter of 0.531", outer diameter of 1.75", and thickness tolerance of 0.090-0.112". It conforms to Grade 8 strength classification and hardness standard of Rockwell C38. Regulatory compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), ensuring adherence to hazardous substance restrictions and environmental safety protocols.