Flat Washers
Available2,180 products
Flat washers evenly distribute pressure when a bolt or screw is tightened. Its thin, plate-shape increases surface area to prevent the loosening and pullout of a fastener. They also relieve surface friction and can be used as spacers when additional clearance between objects is necessary. Flat washers are available in both standard and bulk pack quantities.
Standard Flat Washers
Standard flat washers provide a smooth surface under the head of a nut or bolt to prevent loosening and damage to the work surface. These round washers also minimize heat and friction during the installation of a threaded fastener. They are used for general purpose applications across a wide range of industries.
Stainless Steel
Plain
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Steel
Finish Type: Unspecified
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Black Oxide
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Grade 2 Steel
Finish Type: Unspecified
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Plain
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Black Oxide
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Zinc Plated
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Hot Dipped Galvanized
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Grade 5 Steel
Black Oxide
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Grade 8 Steel
Finish Type: Unspecified
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Plain
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Black Oxide
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Zinc Plated
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Hot Dipped Galvanized
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18-8 Stainless Steel
Finish Type: Unspecified
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Plain
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316 Stainless Steel
Finish Type: Unspecified
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Plain
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Grade 2 Brass
Plain
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Grade 2 Titanium
Plain
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Grade 2 Plastic
Plain
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Oversized Flat Washers
These washers have a wider surface than standard flat washers to cover oversized holes and distribute the load over a broader area. The expanded surface area provides additional reinforcement for use in sheet metal and plumbing applications.
Narrow Flat Washers
These washers are thinner than standard flat washers and can be installed in tighter spaces. Their light weight makes them ideal for use with softer materials.
SAE Flat Washers
SAE flat washers meet the specifications of the Society of Automotive Engineers (SAE) and are used for a broad range of automotive manufacturing applications. They have smaller inner and outer diameters and less thickness than USS flat washers.
USS Flat Washers
These washers meet United States Standard (USS) specifications and engineering requirements for most industrial manufacturing, maintenance, and repair applications. They are thicker than SAE washers and provide a strong connection at the joint to help distribute pressure and prevent leaks.
Mil. Spec. Flat Washers
These washers meet rigorous U.S. military specifications and standards to ensure high performance and reliability in demanding environments. They are commonly used for defense-specific applications and in industrial and automotive environments.
Square Flat Washers
Square washers have a larger surface area than round washers for better torque distribution. They are thick with a broad shape to protect against the damage of wood fibers used in wood construction. Square washers also limit sound levels, vibration, and electrical current for use in seismic applications.
Slotted Flat Washers
These "C-shaped" washers can be slipped on and removed from a bolted joint making for easier installation than other flat washers. They are commonly used in construction, fixtures, jigs, work-holding set-ups, and other environments where it would be dangerous or time-consuming to disassemble the existing fastened installation to add a new washer.
Hygienic Design Flat Washers
Hygienic flat washers are used with narrow shank bolts and screws to secure fasteners against loosening or loss. These stainless steel retaining washers meet requirements for use in hygienic applications.
Washer Assortments
Washer assortments provide a broad range of washer sizes and styles in varying thicknesses. They are commonly used in manufacturing or assembly applications.