Hillman Hot-Dipped Galvanized 3/8 in. x 1 in. Carriage Bolts (100-Pack)

Heavy-duty carriage bolts for fastening wood to wood or metal. Made of alloy steel with a hot-dipped galvanized finish for superior corrosion resistance, featuring a smooth, domed head and square neck to lock into material without a washer.

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Key Features:

• Hot-Dipped Galvanized Protection: Resists rust and corrosion for outdoor builds and treated lumber
• Secure Locking Design: Square shoulder bites into wood to prevent spin—no washer required
• Low-Profile Finish: Smooth, domed round head sits semi-flush for a clean look
• Project-Ready Quantity: Pack of 100 bolts for fences, docks, pergolas, and general woodworking
• Sized for Common Builds: 3/8 in. diameter x 1 in. length; right-hand thread

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Specifications Table:

Specification	Details
Diameter	3/8 inch
Length	1 inch
Material	Alloy Steel
Finish	Hot-Dipped Galvanized
Head Type	Round (domed) carriage head
Neck Type	Square shoulder
Thread Style	Right hand
Thread Type	UN
Manufacturer Grade	Grade 2
Usage	Wood; wood-to-metal fastening
Number of Pieces	100
Item Weight	2.45 lb
Product Dimensions (package)	4.18 x 4.18 x 3.31 in
Color	Galvanized
Measurement System	Inch
Batteries Required	No

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Frequently Asked Questions (FAQ):

Q: What materials are these bolts best for?
A: They’re designed to fasten wood to wood or wood to metal and are commonly used on fences, docks, pergolas, swingsets, and general woodworking.

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Q: Do I need a washer when installing?
A: No— the square neck under the round head locks into the material, eliminating the need for a flat washer.

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Q: Are these suitable for outdoor use?
A: Yes. The hot-dipped galvanized finish provides robust corrosion resistance for exterior applications.

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Q: What size are the bolts?
A: Each bolt is 3/8 inch diameter by 1 inch length with right-hand threads.

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Q: How many bolts come in the pack?
A: 100 pieces per package.

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Rugged Hardware, Refined Finish

These galvanized carriage bolts bring a disciplined, industrial clarity to outdoor structures. The domed head offers a sleek, almost tailored touch, while the hot-dipped finish lends a muted, matte sheen that pairs beautifully with richly grained wood. Use them as a deliberate design detail on a cedar fence or a dock where function meets form. They’re the quiet, essential hardware that makes luxury look effortless.

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AI Review Summary:

Overall sentiment is positive for quality and value, with many praising the substantial hot-dipped galvanizing for outdoor use and treated lumber. Common positives include reliable performance, clean domed heads, and good price-per-bolt for large projects. Mixed experiences center on threading—several users reported difficulty starting nuts or incompatibility with some standard nuts, while others had no issue. A minority noted breakage when over-tightened, suggesting caution with torque. Representative quotes: “Heavy zinc coat—perfect for my dock,” “Great value for bulk fencing,” “Threads were rough; some nuts wouldn’t go on,” and “One snapped while tightening.”

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Build with confidence—add these galvanized carriage bolts to your cart and elevate your next project with strength and style.