Meet the Hillman 3/8 in. x 10 in. Zinc-Plated Steel Carriage Bolt — a dependable, long-length fastener designed for durable timber and metal-to-wood connections. Built to handle outdoor and indoor projects with equal reliability, this bolt combines solid steel strength with a corrosion-resistant finish to keep projects secure over time.
Why this carriage bolt stands out
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3/8 in. diameter x 10 in. length — the generous length gives you the reach you need for thick timber, heavy frames, or mounting brackets, reducing the need for additional hardware.
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Zinc-plated finish — engineered for outdoor environments, the zinc coating resists rust and corrosion to extend the life of your deck, fence, shed, or furniture projects.
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Grade 2 steel — proven strength for everyday fastening tasks, delivering dependable performance in wood-to-wood and wood-to-metal assemblies.
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Coarse thread — optimized for grip in softwoods and common construction materials, providing secure clamping with a single nut.
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Carriage bolt design — features a smooth, rounded head and a square neck under the head to help prevent turning during installation when used with a nut and washer.
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Boxed packaging — comes as a single bolt, ready for immediate use or easy stocking in a hardware kit.
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SAE measurement — sized for standard, common hardware applications, ensuring compatibility with typical nuts and washers.
Ideal uses
- Deck and pergola construction or repair, where a secure, long fastener is required to penetrate thick timbers.
- Fence posts, gates, and other outdoor framing where corrosion resistance matters.
- Furniture frames, cabinetry supports, and wooden instrument or equipment mounts that demand a robust, dependable bolt.
- Remodels and repairs that involve combining timber with metal brackets or anchors.
Installation tips
- Pre-drill pilot holes to reduce the risk of wood splitting, especially in denser hardwoods or near edges.
- Pair with a matching nut and washer for a secure, flush-fit connection; avoid overtightening to preserve wood integrity.
- Use with compatible Hillman hardware to ensure proper thread engagement and load distribution.
For reliable, long-lasting fastening in a variety of project scenarios, the Hillman 3/8 in. x 10 in. Zinc-Plated Steel Carriage Bolt offers a practical, professional-grade solution that stands up to the elements while delivering straightforward installation and predictable performance.
