Hillman 3/8 in. x 3-1/2 in. Zinc-Plated Carriage Bolts (50)

Durable zinc-plated steel carriage bolts for fastening wood to wood or metal. Coarse-thread, round-head design with square neck resists spinning and installs cleanly for a semi-flush finish.

Key Features:

• Rugged Construction: Zinc-plated steel provides corrosion resistance for indoor and general-purpose use
• Secure Hold: Square neck under the round head locks into wood to prevent turning during tightening
• Clean Finish: Low-profile dome head eliminates the need for a washer in many applications
• Coarse Thread: SAE coarse thread for quick assembly and strong grip
• Project-Ready Pack: 50-piece box in 3/8 in. diameter by 3-1/2 in. length

Specifications Table:

Frequently Asked Questions (FAQ):

Q: What materials can these carriage bolts fasten?
A: They are commonly used to fasten wood to wood or wood to metal frames.

Q: Are nuts and washers included?
A: No, this listing is for carriage bolts only; purchase compatible 3/8 in. nuts and washers separately if needed.

Q: Are these suitable for outdoor use?
A: Zinc plating offers basic rust resistance but is best for interior or sheltered applications; consider hot-dip galvanized or stainless for harsh outdoor environments.

Q: What thread type do they have?
A: SAE coarse thread.

Q: What is the grade and material?
A: Made from steel; grade information varies by source—use for general-purpose fastening.

Polished Utility with a Clean, Minimal Profile

The rounded dome of this carriage bolt brings a subtle, tailored finish to built-ins and custom millwork. I love the way the square neck tucks in, keeping the face pristine while delivering a firm, no-spin hold. Style it on bench slats or garden gate frames for a refined, hardware-as-detail moment. It’s the quiet, functional luxury that completes a thoughtfully crafted piece.

Equip your next build with these zinc-plated carriage bolts and enjoy a clean look with reliable holding power—add the 50-pack to your cart now.