S-98970A235 3.25" ID x 5.5" 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 hot-dipped galvanized steel coating, extending service life in harsh environments
- Optimal load distribution across large 5.5" OD surface area, preventing joint loosening and material damage
- Precise compatibility with 3" screw sizes through 3.25" ID, ensuring secure fastening alignment
- Enhanced structural integrity from Rockwell B40 hardness, maintaining shape under heavy loads
- Reliable thickness tolerance (0.302-0.332") for consistent performance in industrial assemblies
- Full regulatory compliance meeting RoHS 3 and REACH standards for global industrial use
- Durable inch-system construction ideal for North American machinery and equipment specifications
Professional Applications & Engineering Value
This hot-dipped galvanized steel flat washer delivers critical engineering solutions where corrosion resistance and load distribution are paramount. The substantial 5.5" outer diameter creates an expanded bearing surface that effectively redistributes clamping force, preventing joint failure and surface damage in structural connections. The zinc coating provides sacrificial protection against rust in outdoor construction, marine environments, and industrial settings exposed to moisture. With precise 3.25" inner diameter matching standard 3" screw sizes, this heavy-duty washer maintains alignment in high-vibration applications while the controlled thickness ensures uniform pressure across fastened components. Engineered for construction equipment, heavy machinery, and infrastructure projects requiring durable inch-system fasteners.
Specification Summary & Compliance
Manufactured to inch system standards with dimensions: 3.25" ID (±0.005"), 5.5" OD (±0.010"), and thickness 0.302-0.332". Hot-dipped galvanized steel construction provides consistent Rockwell B40 hardness for mechanical reliability. Compliant with RoHS 3 (2015/863/EU) under exemption 6(a) for lead as steel alloying element and REACH (EC 1907/2006) regulations updated January 17, 2023. Suitable for industrial applications requiring verified material compliance and dimensional precision.
