Hot-Dipped Galvanized 5/16 in. x 4-1/2 in. Carriage Bolts (50-Pack)

Durable Hillman carriage bolts for fastening wood-to-wood or wood-to-metal with a low-profile, domed head. Hot-dipped galvanized steel resists rust for long-lasting outdoor performance in decks, fences, and general construction.

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Key Features:

• Corrosion Resistance: Hot-dipped galvanized steel stands up to moisture and outdoor exposure
• Secure Hold: Square neck under the head locks into wood to prevent spinning during tightening
• Clean Finish: Dome head provides a semi-flush, washer-free appearance
• Coarse Thread: SAE coarse thread for quick assembly and strong grip
• Bulk Value: 50 bolts per box for efficient project coverage

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Specifications Table:

Specification	Details
Brand	Hillman
Diameter	5/16 inch
Length	4-1/2 inch
Material	Steel
Finish	Hot Dipped Galvanized
Grade	2
Thread Type	Coarse (SAE)
Head Style	Carriage (domed) with square neck
Number in Package	50 pack
Packaging Type	Boxed

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Frequently Asked Questions (FAQ):

Q: What materials can these carriage bolts fasten?
A: They are designed primarily for fastening wood to wood or wood to metal frames.

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Q: Do I need a washer under the head?
A: Typically no—the domed head is designed to sit semi-flush without a washer, though washers and nuts may be used on the threaded end as needed.

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Q: Are these suitable for outdoor use?
A: Yes, the hot-dipped galvanized finish provides strong rust resistance for exterior projects.

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Q: What thread type do these bolts use?
A: SAE coarse thread.

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Q: What grade are these bolts?
A: Grade 2 steel, suitable for general-purpose structural and carpentry applications.

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A Clean, Workmanlike Finish for Outdoor Woodwork

There’s a quiet elegance in hardware that disappears into the craft. These galvanized carriage bolts offer a soft, domed cap that reads crisp and intentional on decks, gates, and garden structures. I love the square-neck detail—hidden, yet essential—keeping the face smooth and composed. Use them in rhythmic rows along a cedar fence for a tailored, architectural touch that also lasts; consider these a small luxury of smart construction.

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Choose these galvanized carriage bolts for a clean, durable fasten that elevates your next outdoor build.