S-91081A352 2" ID x 4.25" 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 load distribution with 4.25" outer diameter to prevent surface damage and embedment in soft materials
- Precise fit for 1 7/8" fasteners ensures optimal alignment and reduces installation time
- Heavy-duty steel construction provides excellent durability and corrosion resistance in demanding environments
- ASME B18.21.1 compliance guarantees consistent quality and dimensional accuracy across all applications
- RoHS 3 and REACH compliance meets international environmental standards for safe industrial use
- Versatile thickness range (0.153-0.213") accommodates varying clearance requirements while maintaining structural integrity
- USS designation compatibility ensures seamless integration with existing inch-system fastener assemblies
Professional Applications & Engineering Value
These USS flat washers deliver critical engineering solutions where load distribution and surface protection are paramount. The carbon steel construction combined with the large 4.25" outer diameter effectively spreads clamping force over wider areas, preventing joint loosening and material deformation in heavy machinery, structural steel connections, and industrial equipment assemblies. The precise 2" inner diameter accommodates 1 7/8" fasteners perfectly, eliminating misalignment issues during installation. Manufactured to ASME B18.21.1 standards, these inch-system washers provide reliable performance in construction, manufacturing, and maintenance applications where consistent dimensional accuracy is non-negotiable.
Specification Summary & Compliance
This USS flat washer features a 2" inner diameter, 4.25" outer diameter, and thickness range of 0.153-0.213" designed specifically for 1 7/8" screw sizes. Manufactured in compliance with ASME B18.21.1 standards for dimensional consistency and mechanical properties. The product is fully RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant (updated 06/14/2023, 235 SVHC), meeting the latest environmental regulations for industrial components.
