Description
The 1-1/8" USS Flat Washer is a robust, general-purpose component designed to be used with 1-1/8-inch diameter bolts, screws, and studs. Engineered to United States Standard (USS) dimensions, this flat washer features a wide outer diameter and solid thickness, making it ideal for distributing fastener loads and minimizing surface damage in heavy-duty applications.
Specifications:
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Inner Diameter (I.D.): 1-3/16"
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Outer Diameter (O.D.): 3"
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Thickness: 5/16" (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 other protective coatings
Key Features:
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Wider Bearing Surface: Large outer diameter effectively distributes load over a greater area, reducing material deformation and wear.
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Sized for 1-1/8" Fasteners: Precision clearance accommodates installation tolerance while ensuring strong alignment.
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USS Standard Profile: Offers a looser fit compared to SAE washers, ideal for structural and general-purpose fastening needs.
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Flat and Durable Surface: Provides consistent torque and reduces galling during tightening.
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Corrosion-Resistant Finishes: Suitable for a range of indoor and outdoor applications, including harsh or marine environments.
Typical Applications:
The 1-1/8" USS washer is commonly used in demanding industrial and structural settings, including:
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Heavy steel fabrication and infrastructure
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Agricultural, mining, and construction machinery
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Bridge, highway, and utility installations
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Trailer and vehicle frame assembly
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OEM machinery and MRO operations
