5/16 in. x 3-1/2 in. Galvanized Carriage Bolts (50-Pack)

These Hillman carriage bolts feature a hot-dipped galvanized steel finish for superior rust resistance in outdoor and marine applications. The round head and square neck provide secure, flush fastening in wood-to-wood or wood-to-metal projects. Pack includes 50 coarse-thread bolts for reliable, long-lasting hardware installs.

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Key Features:

• Corrosion Protection: Hot-dipped galvanized steel resists rust for outdoor longevity
• Secure Hold: Square neck locks into wood to prevent spinning during tightening
• Clean Finish: Low-profile round head eliminates the need for a washer and sits semi-flush
• Reliable Strength: Grade 2 steel with coarse SAE threads for general construction use
• Bulk Convenience: 50-piece boxed pack for multi-project efficiency

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Specifications Table:

Specification	Details
Size	5/16 inch diameter x 3-1/2 inch length
Finish	Hot Dipped Galvanized
Material	Steel
Grade	2
Thread Type	Coarse
Unit of Measurement	SAE
Head Style	Round head with square neck
Number in Package	50 pack
Packaging Type	Boxed
Category	Carriage Bolts

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Frequently Asked Questions (FAQ):

Q: What materials are these carriage bolts made from?
A: Steel with a hot-dipped galvanized finish for enhanced corrosion resistance.

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Q: Are these bolts suitable for outdoor use?
A: Yes. The galvanized coating is designed to prevent rust, making them ideal for exterior applications.

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Q: What thread type do they use?
A: Coarse SAE threads.

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Q: Do I need a washer under the head?
A: Typically no—the round head design provides a semi-flush finish, reducing the need for a washer.

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Q: How many bolts come in the package?
A: 50 bolts per boxed pack.

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Understated Hardware, Elevated Craft

The rounded carriage head offers a clean, tailored detail that feels both intentional and timeless. Its galvanized sheen brings a subtle industrial edge while promising performance in the elements. Use these bolts to anchor outdoor benches or garden gates, letting the minimal profile complement warm woods and crisp lines. A quiet essential that ensures durability without compromising style—true luxury in the details.

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Secure your projects with long-lasting, rust-resistant fastening—add this 50-pack of Hillman galvanized carriage bolts to your cart today.