Stainless Steel Carriage Bolts, 5/16 in. x 2-1/2 in. (25-Pack)

Durable Hillman stainless steel carriage bolts designed for fastening wood to wood or metal with a clean, semi-flush finish. The square neck locks into place to prevent spinning, and stainless construction resists rust for long-lasting outdoor performance.

Key Features:

• Rust-Resistant Stainless Steel: Superior corrosion protection for outdoor and marine applications
• Self-Locking Square Neck: Prevents bolt spin during installation for easier fastening
• Smooth Domed Head: Creates a semi-flush finish and eliminates the need for a washer under the head
• Coarse Thread SAE: Reliable grip in wood and metal framing
• Convenient 25-Pack: Boxed C-Pak for efficient project and jobsite use

Specifications Table:

Frequently Asked Questions (FAQ):

Q: What size are these carriage bolts?
A: They are 5/16 inch diameter by 2-1/2 inch length with coarse SAE threads.

Q: Do I need a tool to hold the head during installation?
A: No. The square neck under the domed head locks into the material to prevent spinning.

Q: Are these suitable for outdoor use?
A: Yes. Stainless steel provides superior rust prevention, ideal for outdoor and damp environments.

Q: How many bolts come in the package?
A: 25 bolts per retail package.

Q: What materials can these fasten?
A: They are designed to fasten a wooden face to a wood or metal frame.

A Sleek, Polished Fastener for Clean, Modern Builds

The domed head and streamlined silhouette bring a refined, unobtrusive detail to decks, benches, and custom millwork. Stainless steel lends a luminous, architectural finish that pairs beautifully with natural woods. Use them to create crisp, flush surfaces where hardware should whisper, not shout. These bolts are the quiet luxury essential for enduring outdoor craftsmanship.

Choose Hillman stainless carriage bolts for a clean finish and rust-proof strength—perfect for your next outdoor build.