Hillman Galvanized 3/8" x 3-1/2" Carriage Bolts (50-Pack)

Durable hot-dipped galvanized steel carriage bolts for fastening wood to wood or metal with a clean, low-profile finish. The square shoulder locks into material for secure, washer-free installation and coarse threads ensure reliable grip in outdoor or high-moisture environments.

Key Features:

• Rust-Resistant Protection: Hot-dipped galvanized finish delivers superior corrosion resistance for exterior use
• Secure Hold: Square shoulder locks into wood for anti-rotation and eliminates the need for a flat washer
• Clean, Low-Profile Finish: Smooth domed head sits semi-flush where space is tight
• Reliable Threading: Coarse SAE threads provide strong engagement in wood and metal
• Sized for Versatility: 3/8 in. diameter x 3-1/2 in. length, 50 bolts per boxed pack

Specifications Table:

Frequently Asked Questions (FAQ):

Q: What materials can these carriage bolts be used with?
A: They are designed to fasten a wooden face to either a wood or metal frame.

Q: Do I need a washer under the head?
A: No— the square shoulder bites into the material and prevents rotation, eliminating the need for a flat washer under the head.

Q: Is pre-drilling required?
A: Yes, drill a hole matching the 3/8 in. diameter for proper fit and installation.

Q: Are these suitable for outdoor applications?
A: Yes, the hot-dipped galvanized finish offers excellent rust resistance for exterior and high-moisture environments.

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

Crisp, Galvanized Hardware for Clean, Cohesive Builds

These carriage bolts bring a refined, utilitarian elegance to outdoor structures and rustic interiors alike. The domed head offers a subtle, polished detail while the galvanized finish harmonizes with weathered woods and industrial metals. Use them to unify deck railings, garden gates, or exposed timber joinery for a tailored, cohesive look. A must-have detail for achieving durable, design-forward craftsmanship.

Upgrade your project with galvanized reliability—add this 50-pack of Hillman carriage bolts to your cart today.