Description
The 1-7/8" USS Flat Washer is a heavy-duty, general-purpose flat washer designed for use with 1-7/8-inch diameter bolts, screws, and studs. Manufactured to United States Standard (USS) dimensions, this washer provides an extra-wide outer diameter and substantial thickness, making it well-suited for spreading high loads and protecting surfaces in critical structural, mechanical, and industrial applications.
Specifications:
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Inner Diameter (I.D.): 1-15/16"
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Outer Diameter (O.D.): 5"
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Thickness: 1/2" (nominal)
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Standard: USS (United States Standard)
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Material: Typically low carbon steel; available in stainless steel, brass, or specialty alloys
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Finish Options: Plain, zinc-plated, hot-dip galvanized, black oxide, or other corrosion-resistant coatings
Key Features:
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Wide Load-Bearing Surface: Large O.D. distributes clamping forces across a broader area to reduce stress and material distortion.
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Sized for 1-7/8" Fasteners: Clearance I.D. ensures compatibility with standard bolt dimensions and manufacturing tolerances.
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USS Fit Standard: Provides a looser fit than SAE washers—beneficial in heavy structural or general-purpose use where minor misalignment is permissible.
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Flat, Machined Surface: Promotes consistent torque and uniform load transfer under high tightening force.
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Protective Finish Options: Multiple corrosion-resistant finishes available for harsh, wet, or chemically exposed environments.
Common Applications:
The 1-7/8" USS flat washer is typically found in high-load structural assemblies and heavy machinery, such as:
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Bridge and highway structural joints
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Heavy equipment and industrial vehicle assemblies
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Agricultural and earthmoving equipment
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Steel framing and infrastructure projects
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Large-scale OEM manufacturing and repair operations
