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Description
13990020 – Wright Lock Washer, 1/4 Inch, Zinc-Plated (Genuine Wright OEM Part)
The Wright 13990020 is a genuine OEM 1/4-inch lock washer, engineered to prevent fasteners from loosening due to vibration and repeated operation in compatible Wright lawn and turf equipment. This washer applies spring tension beneath the bolt head or nut, helping maintain consistent clamping force in critical mechanical and structural assemblies.
Manufactured to Wright original equipment specifications, the lock washer features a zinc-plated (Z) finish that provides enhanced corrosion resistance for outdoor and commercial mowing environments. Using a genuine Wright lock washer ensures correct dimensions, proper fitment, and factory-approved fastening reliability.
Product Details
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Manufacturer Part Number: 13990020
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Brand: Wright
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Part Type: Lock Washer
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Size: 1/4 inch
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Finish: Zinc-Plated (Z)
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System: Fastening / hardware system
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Function: Prevents fastener loosening due to vibration
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Material: Steel, zinc-plated
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OEM Status: Genuine Wright OEM replacement
Function
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Maintains tension under bolts and nuts
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Reduces loosening caused by vibration and movement
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Helps secure fasteners in high-vibration applications
Compatible With
The Wright 13990020 Lock Washer is used on select Wright equipment, including:
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Wright stand-on mowers
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Wright commercial lawn and turf equipment
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Wright assemblies requiring 1/4-inch lock washers
(Exact compatibility depends on the specific Wright model and fastening location.)
How It’s Used
This lock washer installs between the bolt or nut and the mating surface. When tightened, it applies spring force that resists loosening during operation.
Ensure the washer is paired with the correct 1/4-inch fastener and seated properly.
Suggested Maintenance
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Inspect lock washers during service for flattening or corrosion
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Replace washers that have lost spring tension
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Always use the correct washer size for the fastener
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Replace lock washers when fasteners are removed for critical assemblies
The Wright 13990020 1/4-Inch Zinc-Plated Lock Washer is used in OEM-specified Wright fastening systems where vibration resistance, durability, and secure fastening are essential.
