Mutual Screw & Supply

5/16-18 X 3/4" Carriage Bolts | Fully Threaded | A307 Grade A Plain Steel (2000 / Pkg.)

5/16-18 X 3/4" Carriage Bolts | Fully Threaded | A307 Grade A Plain Steel (2000 - Main image
$91.45 $149.91 In stock

5/16-18 X 3/4" 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: 3/4"
  • Threads Per Inch: 18
  • Material: A307 Grade A Plain Steel
  • Finish: Plain
  • Thread Style: Fully Threaded
  • Pack Quantity: 2000
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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)

Adam W. ★★★★★

The low-profile head sits perfectly flush on my trailer frame, and the square neck keeps them from spinning while I tighten the nut. These are exactly the right size for securing metal brackets to wood, and the full threading let me cut a few shorter without issues. For the price per piece in a 2,00

Thomas L. ★★★★★

These bolts installed cleanly in some wooden garden furniture I was repairing, and the fully threaded shaft gave me plenty of grip. The square neck locked in place without any spinning, saving me a lot of frustration. A solid buy for the price, especially with 2000 in the box.

Alexander A. ★★★★★

The square neck grabbed perfectly into the wood, so I didn't need a second wrench to keep the bolt from spinning while tightening. For the price, getting two thousand of these in plain steel feels like a steal for my deck project.