S-90476A119 0.938" ID x 2.25" 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
- Superior corrosion resistance with zinc yellow-chromate plating, extending service life in harsh industrial environments
- Exceptional load distribution thanks to the 2.25" outer diameter, preventing surface damage and joint loosening
- High-strength performance with Grade 9 classification and Rockwell C43 hardness for demanding applications
- Precise fit and alignment with 0.938" inner diameter designed specifically for 7/8" fasteners
- Industry-standard compliance meeting ASME B18.21.1 specifications for reliable, consistent performance
- Environmental responsibility with RoHS 3 and REACH compliance, ensuring safe use in regulated industries
- Durable construction from 0.136-0.192" thick steel providing long-term reliability under heavy loads
Professional Applications & Engineering Value
This Grade 9 USS flat washer delivers critical engineering solutions for heavy-duty industrial applications where failure is not an option. The zinc yellow-chromate plated steel construction provides exceptional corrosion resistance, making it ideal for outdoor equipment, structural steel connections, and machinery exposed to moisture or chemicals. With Rockwell C43 hardness and Grade 9 strength classification, this washer maintains integrity under extreme pressure and vibration, preventing joint failure in critical assemblies. The precise 7/8" inner diameter and 2.25" outer diameter work together to distribute clamping forces evenly, protecting sensitive surfaces and maintaining bolt preload in high-vibration environments common in construction, mining, and heavy equipment manufacturing.
Specification Summary & Compliance
This USS flat washer features dimensional specifications of 0.938" ID, 2.25" OD, and thickness ranging from 0.136" to 0.192" with manufacturing compliance to ASME B18.21.1 standards. The product meets RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) regulations (updated 06/14/2023, 235 SVHC), ensuring environmental responsibility and regulatory adherence for global industrial applications.
