[5 PKG] A307 Grade A Steel Hot Dipped Galvanized Coarse Carriage Bolts 3/4-10 x 20

A307 Grade A Steel hot-dipped galvanized Coarse Carriage Bolts 3/4-10 x 20 are built for outdoor wood-to-wood connections and heavy-duty structural joinery. The Grade A carbon steel core provides reliable strength, while the hot-dipped galvanized finish delivers durable corrosion resistance in exterior and damp environments.

Product Highlights

• Size and thread: 3/4 in diameter, 10 threads per inch (coarse), 20 in length
• Head and shank: Domed carriage bolt head with a square undercut minimizes rotation for easy tightening
• Finish: Hot-dip galvanized coating for long-lasting protection against rust and chemicals
• Material: A307 Grade A steel, suitable for general structural uses
• Applications: Ideal for outdoor decks, fences, timber framing, and any wood-to-wood connection
• Standards: Meets A307 Grade A specification for general-purpose carbon steel bolts

Why Choose These Bolts?

Choose A307 Grade A Steel hot-dipped galvanized carriage bolts when you need dependable strength and robust corrosion resistance in exposed environments. The square neck under the head prevents turning during installation, allowing you to snug the nut without holding the bolt.

Installation Tips

Pair with compatible nuts and washers. Pre-drill pilot holes suited to the timber species and bolt diameter to reduce splitting. Use appropriate tools to avoid over-tightening.

Specifications at a Glance

• Carriage bolts
• A307 Grade A steel
• Hot-dipped galvanized
• 3/4 in diameter, 10 TPI
• 20 in
• Yes