S-90476A117 0.5" ID x 1.25" OD ASME B18.21.1 USS Washers
USS 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 corrosion resistance with zinc yellow-chromate plating for extended service life in harsh industrial environments
- Superior load distribution thanks to USS flat design with 1.25" OD, preventing surface damage and maintaining joint integrity
- High-strength performance with Grade 9 classification and Rockwell C43 hardness for demanding heavy-duty applications
- Precise compatibility with 7/16" screws through 0.5" ID, ensuring secure fastening and vibration resistance
- Reliable dimensional consistency manufactured to ASME B18.21.1 specifications for predictable performance
- Environmental compliance meeting RoHS 3 and REACH standards for safe, sustainable industrial use
- Durable material construction using plated steel for optimal balance of strength and corrosion protection
Professional Applications & Engineering Value
This Grade 9 USS flat washer delivers critical engineering value through its zinc yellow-chromate plated steel construction, specifically engineered to combat corrosion in demanding industrial settings. The combination of Rockwell C43 hardness and USS designation ensures reliable performance under heavy loads, preventing joint loosening and material deformation. Perfect for construction equipment, heavy machinery, and structural applications, these inch system washers provide consistent 0.5" ID to 1.25" OD dimensions that maintain bolt tension and distribute pressure evenly. The ASME B18.21.1 compliance guarantees dimensional accuracy across production batches, while the surface treatment resists chemical exposure and weathering - solving common failure points in industrial fastening systems.
Specification Summary & Compliance
Manufactured to ASME B18.21.1 standards with precise dimensions: 0.5" inner diameter, 1.25" outer diameter, and thickness ranging 0.064-0.104". This Grade 9 washer features Rockwell C43 hardness and is designed for 7/16" screw sizes. Compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and industrial reliability.
