S-90476A121 1.063" ID x 2.5" 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, extending service life in harsh industrial environments
- Superior load distribution from the 2.5" outer diameter, minimizing surface pressure and preventing material damage
- High-strength Grade 9 performance with Rockwell C43 hardness for reliable performance in demanding applications
- Precise 1.063" inner diameter fit ensures optimal alignment and secure fastening with 1" screws
- ASME B18.21.1 compliance guarantees consistent quality, dimensional accuracy, and interchangeability
- Robust thickness range (0.136-0.192") provides durability and compensates for minor surface irregularities
- Full regulatory compliance with RoHS 3 and REACH standards for safe, environmentally responsible usage
Professional Applications & Engineering Value
This Grade 9 USS flat washer delivers critical engineering solutions where high-strength fastening and corrosion protection are paramount. The zinc yellow-chromate plated steel construction provides superior barrier protection against rust and chemical exposure, making it ideal for outdoor infrastructure, heavy machinery, and marine applications. With its Rockwell C43 hardness and substantial 2.5" OD, this heavy-duty component effectively distributes clamping forces over wider areas, preventing joint loosening under vibration and reducing stress concentrations on connected surfaces. The precise 1.063" ID ensures proper centering on 1" fasteners, maintaining alignment integrity in structural assemblies, construction projects, and industrial equipment where reliability cannot be compromised.
Specification Summary & Compliance
This USS flat washer features dimensional specifications of 1.063" ID x 2.5" OD with thickness ranging 0.136-0.192", manufactured to ASME B18.21.1 standards for inch system washers. The component maintains Grade 9 strength classification with Rockwell C43 hardness verification and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring both mechanical performance and regulatory adherence for industrial applications.
