S-98026A122 1.25" ID x 2.75" OD ASME B18.21.1 General Purpose Washers
General Purpose 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 corrosion protection with black-coated steel construction for extended service life in harsh environments
- Exceptional load distribution from the large 2.75" outer diameter, preventing surface damage and joint loosening
- High-strength Grade 8 performance with Rockwell C38 hardness for demanding industrial applications
- Precise compatibility with 1 1/8" fasteners thanks to the exact 1.25" inner diameter specification
- Industry-standard compliance with ASME B18.21.1 ensuring reliable dimensional accuracy and performance
- Environmental responsibility with full RoHS 3 and REACH compliance for safe, regulated usage
- Optimal thickness range (0.136-0.160") providing consistent compression and vibration resistance
Professional Applications & Engineering Value
This heavy-duty Grade 8 USS flat washer delivers critical engineering solutions where standard washers fail. The black corrosion-resistant coated steel construction specifically addresses industrial degradation challenges in outdoor, marine, and chemical exposure environments. With its large 2.75" OD and precise 1.25" ID, this washer effectively distributes clamping forces across wider surfaces, preventing embedment in soft materials and maintaining bolt tension in vibrating machinery. The Rockwell C38 hardness ensures the washer maintains its structural integrity under extreme pressure, making it ideal for heavy equipment, structural steel connections, and high-vibration applications where joint failure is not an option.
Specification Summary & Compliance
Manufactured to ASME B18.21.1 standards with dimensional specifications including 1.25" inner diameter, 2.75" outer diameter, and thickness range of 0.136-0.160". The washer features Grade 8 strength classification with Rockwell C38 hardness and is designed for use with 1 1/8" fasteners. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental safety and regulatory acceptance for industrial distribution.
