Hillman 5/16 in. x 2-1/2 in. Galvanized Carriage Bolts (100-Pack)

Heavy-duty Hillman carriage bolts secure wood-to-wood or wood-to-metal connections with a smooth, low-profile dome head. Hot-dipped galvanized steel resists rust for outdoor and marine projects, while the square neck locks into place to prevent spinning during installation.

Key Features:

• Corrosion Resistance: Hot-dipped galvanized steel stands up to weather and moisture.
• Secure Hold: Square neck under head bites into wood to prevent bolt spin.
• Clean, Low-Profile Finish: Dome head eliminates need for a washer in many applications.
• Bulk Value: 100 bolts per box for jobsites and large projects.
• SAE Coarse Threads: Grade 2 steel with coarse threading for quick assembly.

Specifications Table:

Frequently Asked Questions (FAQ):

Q: What size are these carriage bolts?
A: They are 5/16 inch diameter by 2-1/2 inch length with SAE coarse threads.

Q: Are nuts and washers included?
A: No. This package includes bolts only; purchase compatible 5/16 in. nuts and washers separately if needed.

Q: Can these be used outdoors?
A: Yes. The hot-dipped galvanized finish provides strong rust resistance suitable for exterior use.

Q: What materials can I fasten with these?
A: They are ideal for attaching wood to wood or wood to metal frames.

Q: What grade is the steel?
A: Grade 2 steel, appropriate for general-purpose fastening.

A Quiet, Rugged Detail for Seamless Outdoor Builds

The softened dome head offers a refined, unobtrusive accent against timber, delivering strength without visual clutter. I love the subtle matte texture of hot-dipped galvanizing—it feels authentically crafted and confidently durable. Use these in rhythmic intervals along a garden bench or gate to create a tailored, uniform line. It’s a small hardware choice that elevates structures into enduring, luxurious essentials.

Outfit your next project with these galvanized carriage bolts for lasting strength and a clean, professional finish—add the 100-pack to your cart today.