Hillman 1/2" x 3-1/2" Zinc-Plated Carriage Bolts (25-Pack)

Heavy-duty Grade 2 steel carriage bolts with a corrosion-resistant zinc-plated finish for secure wood-to-wood or wood-to-metal fastening. The rounded, low-profile head with square neck locks into wood to prevent spinning and allows a semi-flush finish. Ideal for decks, fences, and general construction projects.

Key Features:

• Secure Wood Fastening: Square neck locks into wood to prevent bolt spin during tightening
• Rust-Resistant Finish: Zinc plating provides durable, consistent corrosion protection
• Low-Profile Head: Rounded carriage head delivers a clean, semi-flush look without a washer
• Heavy-Duty Steel: Grade 2 steel construction for reliable strength in structural applications
• Bulk Value Pack: 25 bolts per box for project efficiency

Specifications Table:

Frequently Asked Questions (FAQ):

Q: What materials can these carriage bolts fasten?
A: They are designed for fastening a wooden face to either a wood or metal frame, commonly used in decks, fences, and framing.

Q: Do I need a washer under the head?
A: Typically no—the flat, rounded carriage head is designed to provide a semi-flush finish without a washer.

Q: Are these suitable for outdoor use?
A: The zinc plating offers rust resistance for many applications, but may not be ideal for harsh exterior environments; consider hot-dip galvanized for extreme exposure.

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

Q: What size and length are included in this pack?
A: Each bolt is 1/2 inch diameter by 3-1/2 inches in length; 25 bolts per retail package.

A Clean, Polished Fastener for Timeless Woodwork

The rounded carriage head brings a refined, minimalist touch to exposed joinery, elevating everyday builds with a sleek, polished sheen. I love the square-neck detail—it locks into place, keeping lines crisp and surfaces uninterrupted. Use these on a painted garden gate or a natural wood bench to let the hardware quietly shine. Essential for luxe, lasting craftsmanship that feels both sturdy and sophisticated.

Choose this 25-pack of zinc-plated Hillman carriage bolts for clean, secure wood-to-metal connections that last.