Engineered for secure, long-lasting wood-to-wood connections, these A307 Grade A steel carriage bolts are hot dipped galvanized to resist corrosion in outdoor and damp environments. With a 5/16-18 coarse thread and a 2-3/4 inch length, theyre ideal for deck building, fencing, and timber framing.

Key benefits

• Material: A307 Grade A steel for strength and reliability
• Finish: Hot dipped galvanized (HDG) coating for superior corrosion resistance
• Size & thread: 5/16-18 coarse thread, 2-3/4 inch length
• Head design: Carriage bolt with domed head and square neck to prevent turning during installation
• Versatility: Suitable for a wide range of timber projects and outdoor constructions

Specifications

• Size: 5/16-18 x 2-3/4 in
• Thread: Coarse 18 TPI
• Material: A307 Grade A steel
• Finish: Hot dipped galvanized (HDG)
• Head type: Carriage bolt with domed head and square neck

Applications

Ideal for wood-to-wood connections in outdoor decks, fences, pergolas, and timber framing, as well as other structural wood projects that require strong, corrosion-resistant fasteners.

Durability and performance

The HDG coating provides lengthy protection against rust and corrosion, extending the life of your outdoor installations. The carriage bolt design ensures a secure fit by minimizing rotation during tightening, delivering clean, reliable results in both professional and DIY settings.