S-90108A040 1.375" ID x 3" 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 load distribution with 3" outer diameter to prevent surface damage and fastener embedment
- Reliable corrosion protection through zinc plating for extended service life in industrial environments
- Precise fitment with 1.375" inner diameter designed specifically for 1 1/4" screw sizes
- Consistent performance with thickness ranging 0.136-0.192" to maintain uniform pressure distribution
- Industry-standard compliance meeting ASME B18.21.1 specifications for dimensional accuracy
- Environmental responsibility with RoHS 3 and REACH compliance for global manufacturing applications
- Durable steel construction providing excellent strength and longevity in demanding applications
Professional Applications & Engineering Value
These USS flat washers deliver critical engineering solutions for heavy-duty industrial applications where load distribution and surface protection are paramount. The zinc-plated steel construction provides excellent corrosion resistance in harsh environments, while the substantial 3" outer diameter effectively distributes clamping forces to prevent damage to connected materials. The precise 1.375" inner diameter ensures proper fitment with 1 1/4" fasteners, eliminating play and maintaining alignment in structural assemblies, machinery, and equipment frameworks. The flat washer design according to USS standards offers reliable performance in construction, manufacturing, and maintenance operations where vibration resistance and long-term reliability are essential.
Specification Summary & Compliance
This USS flat washer features dimensional specifications including 3" outer diameter, 1.375" inner diameter, and thickness range of 0.136-0.192" designed for 1 1/4" screw sizes. Manufactured to ASME B18.21.1 standards for dimensional accuracy and performance requirements. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental responsibility and suitability for global industrial applications.
