Meet the Hillman 5/8-11 in. x 12 in. Hot Dipped Galvanized Steel Carriage Bolt — a purpose-built fastener designed for durable, outdoor wood connections. Supplied in a 25-pack, it’s ready for deck-building, fencing, and timber-frame projects where lasting strength matters.
Why this bolt stands out
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Corrosion-resistant finish: Hot-dipped galvanized coating shields the steel from moisture, rain, and outdoor exposure, making it ideal for exterior wood applications.
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Precise, wood-friendly threading: 5/8 inch diameter with 11 threads per inch (UNC) and a coarse thread pattern that bites into wood for strong, reliable clamping.
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Classic carriage bolt design: The domed head rides flush against timber while the square neck under the head prevents rotation during installation, delivering a clean, secure connection every time.
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Generous length for sturdy assemblies: 12 inches long provides ample bite for thick timbers, fastened with a nut on the opposite side for a solid, vibration-resistant joint.
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Bulk practicality: 25 bolts per box streamline larger builds and reduce reordering stops mid-project.
Ideal applications
Designed for outdoor woodworking, these carriage bolts excel in:
- Deck framing and railing assemblies
- Fencing and gate supports
- Timber posts, pergolas, and garden structures
- Pressure-treated lumber connections where a strong, non-corrosive fastener is essential
Installation tips for best results
- Pre-drill pilot holes to minimize wood splitting, then insert the bolt and thread on a nut from the opposite side.
- Use a washer with the nut if you’re joining wider boards to distribute load and protect the wood surface.
- Ensure the receiving nut is compatible with standard hex nuts sized for 5/8 inch bolts for a secure fit.
What you get
- 25 Hillman 5/8-11 x 12 inch hot-dipped galvanized steel carriage bolts
- Boxed packaging for straightforward storage and transport
- Material: steel; Finish: hot-dipped galvanized; Grade: 2; Thread Type: coarse
When outdoor durability and dependable wood-to-wood connections are non-negotiable, the Hillman 5/8-11 in. x 12 in. carriage bolts deliver long-lasting performance you can rely on from project start to finish.
