5/16-18 X 4-1/2″ Carriage Bolts in A307 Grade A Plain Steel. Carriage bolts feature a smooth, rounded head with a square neck underneath that pulls into the material to prevent the bolt from turning during installation, making them ideal for wood-to-wood and wood-to-metal connections.

• Domed head with square anti-rotation neck
• A307 Grade A Plain Steel construction
• Coarse thread for use in wood and with nuts and washers
• Fully Threaded
• Sold in bulk packs

Specifications

• Thread Size: 5/16-18
• Length: 4-1/2″
• Threads Per Inch: 18
• Material: A307 Grade A Plain Steel
• Finish: Plain
• Thread Style: Fully Threaded
• Pack Quantity: 325