Hillman 3/8 in. x 3-1/2 in. Zinc-Plated Steel Carriage Bolt, Coarse Thread, 50-Pack
Regular price $39.99Hillman 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:
| Specification | Details |
|---|---|
| Diameter | 3/8 inch |
| Length | 3-1/2 inch |
| Material | Steel |
| Finish | Zinc Plated |
| Thread Type | Coarse (SAE) |
| Head Style | Round head with square neck (carriage bolt) |
| Package Quantity | 50 |
| Brand | Hillman |
| Item/SKU | 240174 |
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.
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