Description
12990056 – Toplock Nut 5/8-11 Z
The 12990056 Toplock Nut is a heavy-duty 5/8-11 locking fastener designed to provide superior resistance to vibration and loosening in demanding equipment applications. This Toplock-style nut features a distorted top thread locking design, eliminating the need for nylon inserts while maintaining strong, reusable locking performance.
Finished with a zinc (Z) coating, the 12990056 nut offers corrosion resistance suitable for outdoor, commercial, and high-moisture environments. Manufactured to standard fastener specifications, it ensures proper thread engagement and dependable holding strength when used with compatible 5/8-11 bolts.
Product Details
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Part Number: 12990056
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Part Name: Toplock Nut
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Thread Size: 5/8-11
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Thread Type: Unified Coarse (UNC)
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Locking Style: Toplock (distorted thread, all-metal)
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Finish: Zinc-plated (Z)
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Part Type: Locking fastener
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Function: Resists loosening from vibration without nylon insert
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Condition: New
Applications
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Lawn and garden equipment assemblies
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Mower decks, spindles, and chassis components
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Commercial mowing equipment
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Agricultural and industrial machinery
The 12990056 Toplock Nut 5/8-11 Z delivers reliable vibration resistance, corrosion protection, and secure fastening, making it an effective all-metal locking nut for heavy-duty equipment applications.
