Description
The 1/4" USS Flat Washer is a versatile, general-purpose washer engineered for use with 1/4-inch diameter bolts, screws, and studs. Manufactured to United States Standard (USS) specifications, this washer offers a slightly oversized outer diameter and moderate thickness, helping to distribute load, prevent surface damage, and improve joint integrity in everyday fastening applications.
Specifications:
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Inner Diameter (I.D.): 9/32"
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Outer Diameter (O.D.): 5/8"
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Thickness: 1/16" (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, black oxide, hot-dip galvanized, or other corrosion-resistant coatings
Key Features:
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Reliable Load Distribution: Spreads clamping force over a broader surface area to protect softer materials from compression or damage.
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Clearance Fit for 1/4" Fasteners: Allows easy installation and alignment while maintaining reliable fastening performance.
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USS Tolerances: Looser fit compared to SAE washers—suitable for a wide range of general-purpose applications where precision is not critical.
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Flat Surface for Torque Control: Smooth face enhances torque consistency and reduces friction during tightening.
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Optional Protective Finishes: Available with corrosion-resistant coatings for indoor, outdoor, and moisture-prone environments.
Common Applications:
The 1/4" USS washer is ideal for a variety of light- to medium-duty fastening tasks, including:
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Assembly of furniture and fixtures
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Sheet metal fabrication
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DIY and home improvement projects
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Automotive and trailer hardware
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Light-duty mechanical equipment
