Hillman 5/8 in. D x 8 in. L Heat Treated Zinc Steel Hex Head Cap Screw delivers reliable strength for heavy-duty fastening with a finish built to resist corrosion. Designed for tough environments, this Grade 5 hex head cap screw pairs a rugged steel core with a heat-treated zinc coating to resist wear and keep joints secure over time.
Why this Hillman hex head cap screw stands out
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Durable construction: Heat-treated zinc coating provides enhanced hardness and improved wear resistance, helping the screw stand up to repeated loosening and tightening in demanding applications.
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Precise sizing: 5/8 inch head diameter and 8 inch length offer a robust, long-reach fastener for thick materials or assemblies that require a substantial bite.
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Grade 5 strength: Engineered for reliable performance under load, making it suitable for structural connections, machinery assembly, and other demanding tasks.
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Coarse-thread for easy assembly: The coarse thread lets you drive quickly into soft or moderately hard materials, reducing cross-threading and time on the job.
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Hex head for practical driving: Standard hex head accepts common wrenches and drivers, enabling solid torque transfer and simple re-tightening when needed.
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Ready-to-use packaging: Sold as a boxed, single-piece package for straightforward procurement and minimal waste on-site.
Ideal applications
This screw is well-suited for assemblies where a strong, reliable fastener is required in thicker materials. Use cases include:
- Metal-to-metal or metal-to-wood connections in machinery mountings, frame assemblies, and equipment housings.
- Furniture and cabinetry projects where sturdy, long screws are needed to secure heavy components.
- Construction or DIY projects that demand a durable fastener with excellent torque retention in tough environments.
How to get the best results
- Pair with a compatible nut or tapped hole and, if vibration is a concern, consider a light thread locker or a locking washer to reduce loosening over time.
- Pre-drill a pilot hole suited to the material to avoid splitting and to ensure full engagement of the coarse threads.
- Use standard hex drivers or wrenches; apply steady pressure to avoid stripping the hex head during installation.
Specifications at a glance
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Brand: Hillman
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Finish: Heat Treated Zinc
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Grade: 5
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Head type: Hex
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Head diameter: 5/8 in
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Length: 8 in
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Material: Steel
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Thread type: Coarse
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Package: 1 piece in a boxed package
When you need a dependable, long-reach hex cap screw that balances strength and corrosion resistance, this Hillman 5/8 in. D x 8 in. L heat-treated zinc steel fastener is built to perform. Add it to your toolkit for reliable, straightforward fastening on a range of projects.
