S-90474A111 0.281" ID x 0.5" OD ASME B18.21.1 ASME Washers
ASME Washers
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Basic Information
Dimension Parameters
Material & Strength Parameters
Installation & Application Parameters
Finish & Compliance Parameters
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Key Features & Benefits at a Glance
- Exceptional load distribution with precise 0.281" ID and 0.5" OD dimensions for optimal performance with 1/4" fasteners
- Superior corrosion resistance thanks to zinc yellow-chromate plating that protects against harsh industrial environments
- Maximum durability with Rockwell C38 hardness ensuring long service life under heavy loads
- Reliable high-strength performance meeting Grade 8 standards for demanding applications
- Precision manufacturing compliant with ASME B18.21.1 specifications for consistent quality and fit
- Environmental compliance with RoHS 3 and REACH standards for safe, regulated industrial use
- Versatile compatibility with inch system fasteners across various industrial assemblies
Professional Applications & Engineering Value
These Grade 8 flat washers provide critical engineering solutions for industrial applications where vibration resistance, load distribution, and corrosion protection are paramount. The zinc yellow-chromate plated steel construction offers superior barrier protection against moisture and chemicals, significantly extending service life in harsh environments. With Rockwell C38 hardness and precise dimensional tolerances, these washers maintain integrity under extreme pressure while preventing fastener loosening. The 1/4" size compatibility makes them ideal for heavy machinery, structural steel connections, and automotive assemblies where ASME B18.21.1 compliance ensures reliable performance in critical fastening systems.
Specification Summary & Compliance
Manufactured to exacting standards with inner diameter of 0.281", outer diameter of 0.5", and thickness ranging 0.056-0.071" for precise fit with 1/4" fasteners. These flat washers meet Grade 8 strength classification and comply with ASME B18.21.1 specifications for dimensional accuracy and performance. Environmental compliance includes RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) standards, ensuring safe use across regulated industrial applications.
