Hillman 1/2 in. x 9 in. Zinc-Plated Steel Carriage Bolts, Coarse Thread (25-Pack)

Regular price $3.69

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1/2 in. x 9 in. Zinc-Plated Carriage Bolts (25-Pack)

Heavy-duty Hillman carriage bolts made of steel with a corrosion-resistant zinc-plated finish. Coarse-threaded shank and round head with square neck provide strong, secure fastening for wood-to-wood or wood-to-metal projects.


Key Features:

  • Durable Construction: Steel bolt with zinc-plated finish resists rust and corrosion
  • Secure Hold: Round head with square neck prevents spinning during tightening
  • Coarse Thread: Designed for strong grip and quick assembly in framing and decking
  • Sized for Strength: 1/2 in. diameter x 9 in. length for heavy-duty applications
  • Bulk Pack: 25 bolts per box for larger projects or jobsite stocking

Specifications Table:

Specification Details
Material Steel
Finish Zinc-Plated
Diameter 1/2 in.
Length 9 in.
Thread Type Coarse (UNC)
Head Style Round
Neck Square neck
Grade Grade 2
Unit of Measurement SAE
Packaging Type Boxed
Number in Package 25
Product Type Carriage Bolt
Model Number 129CBZ
Item # 240348

Frequently Asked Questions (FAQ):

Q: What nuts and washers fit these bolts?
A: Use 1/2 in. SAE coarse-thread (UNC) nuts and compatible flat or lock washers.


Q: Are these suitable for outdoor use?
A: Yes—the zinc plating provides general corrosion resistance for typical outdoor applications; for harsh coastal environments, consider hot-dip galvanized or stainless.


Q: Do these bolts have a square neck?
A: Yes, the carriage bolt includes a square neck under the round head to lock into wood or square holes.


Q: What is included in the package?
A: This is a box of 25 carriage bolts; nuts and washers are sold separately.


Industrial polish that anchors with intention

The quiet strength of a rounded head in a cool zinc finish offers a chic, utilitarian accent to timber and steel. I love the squared neck detail—it nests into wood like a bespoke joinery moment. Pair these with warm, oiled oak beams or matte-black hardware for a balanced, crafted narrative. The result is foundational luxury—hardware that both performs and elevates.


Secure your next build with reliable, zinc-plated strength—add this 25-pack of Hillman carriage bolts to your cart today.

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