S-91117A246 0.938" ID x 3.25" OD Oversized Washers
Oversized 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 resistance with zinc-plated steel construction for extended service life in harsh environments
- Exceptional load distribution with large 3.25" outer diameter protecting surfaces from damage under heavy loads
- Precise fit for 7/8" fasteners with 0.938" inner diameter ensuring secure installation and vibration resistance
- Enhanced mechanical strength with Rockwell B40 hardness providing reliable performance in demanding applications
- Consistent thickness control (0.235-0.265") for uniform clamping force and improved joint integrity
- Compliance with global standards including RoHS 3 and REACH for safe use in regulated industries
- Heavy-duty construction suitable for industrial machinery, structural applications, and mechanical assemblies
Professional Applications & Engineering Value
These zinc-plated steel flat washers deliver critical engineering solutions where corrosion resistance and load distribution are paramount. The heavy-duty construction with precise inch system dimensions (3.25" OD, 0.938" ID) prevents surface damage and fastener loosening in construction equipment, industrial machinery, and structural applications. The Rockwell B40 hardness ensures consistent performance under vibration and dynamic loads, while the zinc plating provides essential protection against environmental degradation. These flat washers solve common industrial challenges including joint failure, material deformation, and corrosion-induced maintenance issues.
Specification Summary & Compliance
Manufactured to standard inch system dimensions with precise inner diameter (0.938") and outer diameter (3.25") tolerances. Features controlled thickness range (0.235-0.265") and Rockwell B40 hardness for consistent mechanical properties. Compliant with RoHS 3 (2015/863/EU) under exemption 6(a) for lead as alloying element in steel and REACH (EC 1907/2006) regulations (SVHC compliant as of 01/17/2023). Designed specifically for use with 7/8" screw size fasteners in industrial and construction applications.
