[10 PKG] A307 Grade A Steel Hot Dipped Galvanized Coarse Carriage Bolts 1/2-13 x 6 1/2

A307 Grade A Steel Hot Dipped Galvanized Coarse Carriage Bolts 1/2-13 x 6 1/2 are engineered for strong, reliable wood-to-wood connections in outdoor and heavy-duty applications. Constructed from durable A307 Grade A steel and finished with a robust hot-dip galvanizing coating, these carriage bolts deliver superior corrosion resistance and long-lasting performance in decks, fences, timbers, and framing projects.

Key Features

• Material: A307 Grade A steel for dependable strength
• Finish: Hot-dipped galvanized coating for enhanced corrosion resistance
• Size: 1/2 inch diameter, coarse thread 13 per inch, length 6-1/2 inches
• Head Type: Domed carriage bolt head with a square undercut neck to resist turning during installation
• Thread Type: Coarse-threaded for quick assembly in wood
• Applications: Ideal for decks, fences, timber framing, and other wooden structures

Why Choose Hot-Dip Galvanized Carriage Bolts

Hot-dip galvanizing provides a protective zinc coating that shields the steel from moisture, salts, and corrosive elements. This makes the bolts suitable for outdoor use and damp environments, delivering longer service life compared with plain steel fasteners. The coarse thread on these 1/2-13 bolts ensures strong withdrawal and grip in softwoods and treated lumber.

Specifications

• Diameter: 1/2 in
• Thread: 13 TPI (coarse)
• Length: 6-1/2 inches
• Material: A307 Grade A steel
• Finish: Hot-dip galvanized
• Head: Domed carriage bolt with square neck

Installation Tips

For best results, drill a pilot hole in the wooden member if needed, slip the bolt through the joinery, and tighten with a nut on the opposite side. The domed head provides a clean finish while the square neck prevents turning during installation.