Zinc-Plated Steel Carriage Bolts, 5/16 in. x 1-1/2 in. (100-Pack)

These Hillman carriage bolts feature a zinc-plated steel construction for reliable, rust-resistant fastening in wood-to-wood or wood-to-metal applications. The round head and square neck provide a semi-flush finish and self-locking grip without a washer.

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Key Features:

• Durable Construction: Zinc-plated steel resists rust and offers a consistent finish
• Secure Fit: Square neck under the round head locks into wood to prevent spinning
• Semi-Flush Finish: Low-profile dome head eliminates the need for a washer
• General-Purpose Strength: Suitable for most everyday fastening tasks
• Bulk Value: 100-pack for efficient stocking and project use

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Specifications Table:

Specification	Details
Brand Name	Hillman
Finish	Zinc Plated
Grade	2
Length	1-1/2 inch
Material	Steel
Number in Package	100
Packaging Type	Boxed
Thread Type	Coarse
Unit of Measurement	SAE
Diameter	5/16 inch

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Frequently Asked Questions (FAQ):

Q: What materials are these bolts best suited for?
A: Designed to fasten a wooden face to wood or metal frames; ideal for wood-to-wood and wood-to-metal connections.

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Q: Do I need a washer with these carriage bolts?
A: No. The dome head is designed to provide a semi-flush finish that typically eliminates the need for a washer.

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Q: Are the threads coarse or fine?
A: Coarse threads for easier engagement in general-purpose applications.

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Q: Can these be used outdoors?
A: Zinc plating offers basic rust resistance, but may not be ideal for harsh exterior environments; consider stainless or hot-dip galvanized for long-term outdoor exposure.

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Q: Are the bolts fully threaded?
A: They have a partially threaded shank to enhance grip and reduce shear movement.

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A Clean, Polished Fastener for Seamless Wood Detailing

The smooth, rounded head of this carriage bolt delivers a refined, unobtrusive accent across millwork and built-ins. Its zinc sheen complements contemporary hardware, keeping lines crisp and cohesive. Pair with pale oak or painted cabinetry for a subtle, tailored look that feels intentional. A small detail with a big impact—essential for elevated, everyday craftsmanship.

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Equip your project with reliable, clean-finished fastening—add this 100-pack of Hillman zinc-plated carriage bolts to your cart today.