Hillman 3/8 in. x 9 in. Zinc-Plated Steel Carriage Bolt is a dependable, long-reach fastener designed for sturdy wood-to-wood connections. With a rounded head and a square neck, it seats cleanly in timber while resisting turning during tightening, making it ideal for DIY projects and professional builds alike. The zinc-plated finish adds durable corrosion resistance, so you can rely on this bolt in outdoor environments and varied climates.
Key specifications
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Diameter: 3/8 in
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Length: 9 in
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Material: Steel
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Finish: Zinc-Plated
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Thread Type: Coarse
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Grade: 2
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Packaging: Boxed
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Quantity in Package: 1
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Unit of Measurement: SAE
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Product Type: Carriage Bolt
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Brand: Hillman
Why this carriage bolt stands out
- The domed head paired with a square undercut neck prevents rotation as you tighten from the opposite side—great for through-hypothetical joints where access is limited.
- Zinc plating provides corrosion resistance, extending the life of outdoor projects such as decks, fences, or timber gates where moisture exposure is a factor.
- Coarse threads deliver quicker engagement in softwoods and common construction lumber, reducing install time on projects that require multiple fasteners.
- At 9 inches, this bolt accommodates thicker boards or assemblies that need a single, solid anchor without needing extra spacers or adapters.
- Certified Grade 2 strength suits standard-duty applications—from furniture frames to timber framing—without overbuilding for everyday tasks.
Ideal uses and practical tips
- Outdoor decks, fencing, gates, and other wooden structures where a clean, unobtrusive fastener is preferred.
- Furniture frames, shelves, and timber connections where a smooth, rounded head is desirable for aesthetics and safety.
- When installing, pair the carriage bolt with an appropriate nut and washer for a secure load transfer; predrill a pilot hole sized for the bolt to minimize wood splitting.
- Store and handle in the boxed packaging to keep the single bolt protected until you’re ready to use it.
Trust Hillman to deliver straightforward, durable hardware that meets everyday building needs. This 3/8 in. x 9 in. zinc-plated carriage bolt combines practical design with reliable material strength, helping you complete projects with confidence and a clean finish.
