S-91128A167 0.812" ID Square Washers
Square 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" square design for maximum surface coverage and reduced surface pressure
- Enhanced corrosion resistance through black-oxide steel coating for extended service life in harsh environments
- Precise fit and alignment with 0.812" inner diameter specifically engineered for 3/4" screw applications
- Exceptional mechanical strength with Rockwell 15N80 hardness rating for heavy-duty industrial use
- Consistent performance reliability maintained through controlled thickness range of 0.235-0.265"
- Global compliance assurance meeting RoHS 3 and REACH environmental standards for international projects
- Dimensional compatibility with inch system fasteners for seamless integration in North American applications
Professional Applications & Engineering Value
This 4" square washer delivers critical engineering solutions where standard washers fall short. The black-oxide steel construction provides superior corrosion protection in demanding environments like construction, heavy machinery, and outdoor infrastructure projects. The square configuration prevents rotation during installation and offers enhanced bearing surface that distributes clamping force more effectively than round washers. With precise 0.812" inner diameter matching 3/4" screw sizes, it eliminates play and ensures perfect alignment in structural connections. The Rockwell 15N80 hardness guarantees the washer maintains its form under extreme pressure, preventing deformation that could compromise joint integrity in critical applications.
Specification Summary & Compliance
Manufactured to inch system standards with 0.812" ID and 0.235-0.265" thickness tolerance. Features Rockwell 15N80 hardness rating for consistent mechanical properties. Compliant with RoHS 3 (2015/863/EU) under exemption 6(a) for lead as steel alloying element and REACH (EC 1907/2006) standards updated to January 2023 SVHC list. Designed specifically for use with 3/4" screw sizes in industrial and construction applications requiring reliable, heavy-duty fastening solutions.
