Mutual Screw & Supply

5/16-18 X 2-3/4" Carriage Bolts | Fully Threaded | A307 Grade A Zinc Plated Steel (150 / Pkg.)

5/16-18 X 2-3/4" Carriage Bolts | Fully Threaded | A307 Grade A Zinc Plated - Main image
$19.27 $28.76 In stock

5/16-18 X 2-3/4" 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
  • Fully Threaded
  • Sold in bulk packs

Specifications

  • Thread Size: 5/16-18
  • Length: 2-3/4"
  • Threads Per Inch: 18
  • Material: A307 Grade A Zinc Plated Steel
  • Finish: Zinc Plated
  • Thread Style: Fully Threaded
  • Pack Quantity: 75
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Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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

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Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

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

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Customer Reviews (4.6 / 5 · 5 reviews)

Hannah ★★★★★

The square neck grabbed into the wood perfectly on my deck repair, no spinning at all. These bolts feel solid and the threading is consistent through the whole shaft.

Madison ★★★★★

The square neck under the head grabbed the wood instantly, so I didn’t have to hold a wrench on the back side while tightening. Zinc plating looks even and clean, and all 150 arrived straight and ready to go.

Samuel ★★★★★

Finally, a carriage bolt with a square neck that actually bites into the wood and stays put while I tighten the nut. The zinc coating looks clean and should hold up fine for my outdoor deck project.