Description
The 4-3/4" USS Flat Washer is a heavy-duty washer designed for use with 4-3/4-inch diameter bolts, screws, and studs. Manufactured to United States Standard (USS) dimensions, it features an oversized outer diameter and substantial thickness, making it ideal for distributing massive clamping forces and protecting structural surfaces in the most demanding fastening environments.
Specifications:
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Inner Diameter (I.D.): 4-13/16"
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Outer Diameter (O.D.): 11-1/2"
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Thickness: 7/8" (nominal)
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Standard: USS (United States Standard)
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Material: Typically low carbon steel; also available in stainless steel, brass, or specialty alloys
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Finish Options: Plain, zinc-plated, hot-dip galvanized, black oxide, or custom corrosion-resistant finishes
Key Features:
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Massive Load-Bearing Surface: Wide O.D. effectively distributes clamping forces over a large area, reducing surface stress and material distortion.
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Designed for 4-3/4" Fasteners: Clearance I.D. supports proper bolt alignment while accommodating manufacturing tolerances.
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USS Tolerances: Looser fit than SAE washers—ideal for high-capacity assemblies with structural flexibility requirements.
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Flat, Durable Construction: Promotes consistent torque application and secure joint integrity under extreme load conditions.
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Corrosion Protection: Multiple finish options ensure performance in marine, outdoor, or chemically harsh environments.
Common Applications:
The 4-3/4" USS washer is built for large-scale, extreme-duty installations, including:
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Bridge and highway infrastructure
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Offshore platforms and marine structures
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Power plants and industrial machinery
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Anchor bolt and plate assemblies
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OEM and maintenance of oversized equipment
