S-90474A116 0.531" ID x 1" OD ASME B18.21.1 ASME Washers

Key Features & Benefits at a Glance

• Exceptional Load Distribution - Grade 8 classification ensures superior load-bearing capacity, preventing surface damage and maintaining joint integrity under heavy stress.
• Enhanced Corrosion Resistance - Zinc yellow-chromate plating provides robust protection against rust and environmental degradation in demanding industrial settings.
• Precision Fit & Stability - 1/2" ID and 1" OD dimensions ensure accurate alignment with 1/2" fasteners, reducing vibration loosening and improving assembly reliability.
• Optimized Hardness & Durability - Rockwell C38 hardness rating guarantees excellent wear resistance and long-term performance without deformation.
• Regulatory Compliance Assurance - Meets ASME B18.21.1 specifications and RoHS 3/REACH standards, ensuring safety and environmental responsibility.
• Versatile Industrial Application - Inch system compatibility and heavy-duty construction make these washers ideal for machinery, construction, and automotive assemblies.
• Consistent Thickness Control - 0.056-0.071" thickness range maintains uniform pressure distribution for reliable fastener performance.

Professional Applications & Engineering Value

These Grade 8 flat washers deliver critical engineering solutions where vibration resistance and load distribution are paramount. The zinc yellow-chromate plated steel construction combats corrosion in harsh environments like outdoor machinery, automotive undercarriages, and industrial equipment, significantly extending service life. With precise 1/2" ID x 1" OD dimensions and Rockwell C38 hardness, they prevent fastener loosening and surface indentation in high-torque applications. Engineers specify these ASME B18.21.1 compliant washers for structural assemblies, heavy equipment manufacturing, and maintenance operations where failure is not an option, ensuring consistent performance and reduced downtime.

Specification Summary & Compliance

Manufactured to ASME B18.21.1 standards with precise dimensional tolerances, these flat washers feature 0.531" ID, 1" OD, and 0.056-0.071" thickness for reliable fit with 1/2" fasteners. The Grade 8 classification and Rockwell C38 hardness guarantee mechanical strength, while full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) ensures environmental and safety adherence for global industrial use.