Mutual Screw & Supply

5/16-18 X 11" Carriage Bolts | A307 Grade A Zinc Plated Steel (100 / Pkg.)

5/16-18 X 11" Carriage Bolts | A307 Grade A Zinc Plated Steel (100 / Pkg.) - Main image
$39.93 $66.55 In stock

5/16-18 X 11" Carriage Bolts in A307 Grade A Zinc Plated 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 Zinc Plated Steel construction
  • Coarse thread for use in wood and with nuts and washers
  • Sold in bulk packs

Specifications

  • Thread Size: 5/16-18
  • Length: 11"
  • Threads Per Inch: 18
  • Material: A307 Grade A Zinc Plated Steel
  • Finish: Zinc Plated
  • Pack Quantity: 100
Before you pay

Check the method and total at checkout.

When it ships

Allow for processing time as well as the journey to you.

Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

View policy
If you need a refund

Keep your order number and contact the store to start.

Please contact us for the refund processing timeframe before returning an item.

View policy
Delivery costs

Review the cost for your destination and chosen service.

Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

View policy
Returning an item

Check the return conditions before sending anything back.

United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

View policy

Customer Reviews (5.0 / 5 · 5 reviews)

Adam Z. ★★★★★

The square neck grabbed the wood immediately on these 11-inch bolts, no spinning at all during installation. I used them to join heavy timbers, and the zinc coating should hold up fine in my covered deck project.

Eva ★★★★★

Pulling these 11-inch bolts into a cedar deck frame was surprisingly effortless because the square neck really does bite into the wood and prevent spinning, even under heavy torque. The zinc coating looks good and uniform so I'm feeling confident they'll hold up outdoors. Exactly what I needed for a

Joseph T. ★★★★★

I needed long bolts for a heavy-duty deck repair, and the 11-inch length was exactly what I was after. The zinc plating looks clean and these feel solid—no stripped threads out of the package.