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Hillman

Hillman 1/2 in x 3-1/2 in Hot-Dipped Galvanized Steel Carriage Bolt, 25-Pack

Hillman 1/2 in x 3-1/2 in Hot-Dipped Galvanized Steel Carriage Bolt, 25-Pack

Regular price $40.37 USD
Regular price Sale price $40.37 USD
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Hot-Dipped Galvanized 1/2" x 3-1/2" Carriage Bolts (25-Pack)

Heavy-duty Hillman carriage bolts with hot-dipped galvanized steel for superior corrosion resistance in outdoor and marine applications. The square neck locks into wood to prevent spinning, while the dome head offers a clean, semi-flush finish.


Key Features:

  • Corrosion-Resistant Finish: Hot-dipped galvanized steel stands up to harsh outdoor conditions
  • Secure Locking Neck: Square underside prevents bolt rotation in wood without extra tools
  • Clean Dome Head: Provides a semi-flush, washerless finish for a neat appearance
  • Coarse Thread: Easy assembly and strong hold in wood-to-wood or wood-to-metal projects
  • Convenient Bulk Pack: 25 bolts per box for efficient project coverage

Specifications Table:

Specification Details
Diameter 1/2 in
Length 3-1/2 in
Material Steel
Finish Hot Dipped Galvanized
Thread Type Coarse
Unit of Measurement SAE
Packaging Type Boxed
Number in Package 25
Head Type Carriage (dome head with square neck)
Head Diameter / Pitch 1/2 in
Each Weight 5.800 lb
Product Type Carriage Bolt
UPC (alternative) 008236133912; 037504833841

Frequently Asked Questions (FAQ):

Q: What materials can these carriage bolts be used with?
A: They are ideal for fastening a wooden face to wood or metal frames.


Q: Do I need a washer with these bolts?
A: Typically no—the dome head is designed to provide a semi-flush, washerless finish.


Q: Are these suitable for outdoor use?
A: Yes, the hot-dipped galvanized finish offers optimal rust prevention for exterior projects.


Q: What thread type do these bolts have?
A: They feature coarse threads for easier installation and strong grip.


Q: What is included in the pack?
A: A boxed 25-pack of 1/2 in diameter x 3-1/2 in length carriage bolts.


A rugged, architectural accent for outdoor builds

The cool, galvanized sheen introduces a subtle industrial note that pairs beautifully with natural woods. I love the domed head—its minimal profile reads polished while staying purposefully utilitarian. Use these along a cedar fence or deck fascia to create a rhythmic, intentional detail. Durable and refined, they’re the quiet luxury hardware your exterior deserves.


Elevate your next outdoor project with durable, corrosion-resistant Hillman carriage bolts—add this 25-pack to your cart today.

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