3/8 in. x 1 in. Zinc-Plated Steel Carriage Bolts, 100-Pack

Durable Hillman carriage bolts secure wood-to-wood or wood-to-metal projects with a smooth, domed head and square neck that locks into place. Zinc-plated Grade 2 steel offers dependable strength and corrosion resistance for general indoor and sheltered outdoor use.

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Key Features:

• Secure Hold: Square neck under the rounded head locks into wood to prevent spinning during tightening
• Corrosion-Resistant Finish: Zinc-plated steel provides rust resistance and a clean, consistent appearance
• General-Purpose Strength: Grade 2 steel suitable for a wide range of fastening applications
• SAE Coarse Threads: Easy assembly with compatible nuts/washers for 3/8 in. hardware
• Contractor Quantity: 100 bolts per box for efficient stocking and jobsites

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Specifications Table:

Specification	Details
Brand	Hillman
Type	Carriage Bolt
Diameter	3/8 inch
Length	1 inch
Material	Steel
Finish	Zinc Plated
Grade	2
Thread Type	Coarse
Unit of Measurement	SAE
Head Style	Domed/round head with square neck
Count	100 per package
Packaging Type	Boxed
Package Dimensions (L x W x H)	4.3 in x 4.3 in x 3.5 in
Package Weight	4.7 lb

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Frequently Asked Questions (FAQ):

Q: What size are these carriage bolts?
A: They are 3/8 in. diameter by 1 in. length with coarse (SAE) threads.

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Q: What material and grade are they?
A: They are made from Grade 2 steel with a zinc-plated finish.

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Q: Are these suitable for outdoor use?
A: The zinc plating offers light corrosion resistance, making them fine for indoor and some sheltered outdoor applications; for harsh or coastal environments, consider stainless or hot-dipped galvanized hardware.

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Q: Do these include nuts and washers?
A: No. This box includes 100 carriage bolts only; nuts and washers are sold separately.

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Q: How do carriage bolts stay from spinning?
A: A square section beneath the domed head embeds into the wood, locking the bolt in place as the nut is tightened.

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A Clean, Polished Fastener for Seamless Woodwork

The domed head lends a subtle, tailored finish that feels intentional rather than utilitarian. I love how the square neck tucks into timber, keeping the face pristine without extra hardware clutter. Pair these with oiled oak or painted millwork for a crisp, modern-meets-classic detail. A small choice that elevates craft—and the hallmark of refined, livable luxury.

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Outfit your next build with these zinc-plated carriage bolts for a clean look and reliable hold—add the 100-pack to your cart now.