S-93852A159 3.125" ID x 5.5" 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
- Superior load distribution with large 5.5" outer diameter to prevent surface damage and fastener loosening under heavy loads
- Excellent corrosion resistance from 18-8 stainless steel construction for long service life in harsh industrial environments
- Precise dimensional fit with 3.125" inner diameter specifically engineered for 3" screw applications
- Enhanced mechanical stability through substantial 0.249-0.327" thickness range for reliable performance under compression
- Industry-standard compliance with ASME B18.21.1 specifications ensuring consistent quality and interchangeability
- Environmental responsibility with RoHS 3 and REACH compliance for safe use in regulated applications
- Versatile inch system compatibility designed for seamless integration with standard USS flat washer applications
Professional Applications & Engineering Value
This USS flat washer delivers critical engineering solutions for heavy-duty industrial applications where reliable load distribution is paramount. The 18-8 stainless steel composition provides exceptional resistance to corrosion and oxidation, making it ideal for outdoor installations, chemical processing equipment, and marine environments where moisture exposure is constant. With its substantial 5.5" outer diameter and precise 3.125" inner diameter, this washer effectively distributes clamping force over a wider surface area, preventing material deformation and maintaining joint integrity in structural connections, heavy machinery, and large-scale assembly operations. The ASME B18.21.1 compliance ensures dimensional consistency and performance reliability across industrial maintenance and construction projects.
Specification Summary & Compliance
This USS flat washer meets ASME B18.21.1 dimensional standards with inner diameter of 3.125", outer diameter of 5.5", and thickness ranging 0.249-0.327" for use with 3" screw sizes. Manufactured from 18-8 stainless steel in the inch measurement system, the product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe usage across various industrial sectors while maintaining consistent quality and performance specifications.
