S-98970A313 1.5" ID x 3.25" 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 protection through hot-dipped galvanized steel coating, ensuring long-term reliability in harsh environments
- Optimized load distribution with 3.25" OD and 1.5" ID design, preventing surface damage and maintaining joint integrity
- Precise compatibility with 1 3/8" screws, reducing installation errors and improving assembly efficiency
- Robust construction with thickness range 0.153-0.213", providing consistent performance under heavy-duty applications
- Industry-standard compliance with ASME B18.21.1 specifications, guaranteeing dimensional accuracy and mechanical reliability
- Environmental responsibility with RoHS 3 compliance, meeting strict regulatory requirements for hazardous substances
- Versatile industrial suitability for construction and mechanical applications where durable fastening solutions are critical
Professional Applications & Engineering Value
These USS flat washers manufactured from hot-dipped galvanized steel address critical industrial challenges where corrosion and mechanical stress compromise fastener longevity. The zinc coating provides a sacrificial layer that actively resists rust formation in outdoor, marine, and high-moisture environments, significantly extending service life. With their 1.5" ID and 3.25" OD dimensions, these washers effectively distribute clamping forces across a wider surface area, preventing material deformation in structural connections using 1 3/8" screws. This combination of corrosion resistance and load-bearing capacity makes them ideal for construction frameworks, heavy machinery assembly, and infrastructure projects where reliability cannot be compromised.
Specification Summary & Compliance
Manufactured to ASME B18.21.1 dimensional standards with internal diameter of 1.5", outer diameter of 3.25", and thickness range of 0.153-0.213". These USS flat washers comply with RoHS 3 (2015/863/EU) environmental directives and are designed specifically for use with 1 3/8" screw sizes in inch measurement system applications.
