Mutual Screw & Supply

5/16-18 X 2-3/4" Carriage Bolts | Fully Threaded | A307 Grade A Plain Steel (750 / Pkg.)

5/16-18 X 2-3/4" Carriage Bolts | Fully Threaded | A307 Grade A Plain Steel - Main image
$91.87 $131.24 In stock

5/16-18 X 2-3/4" 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: 2-3/4"
  • Threads Per Inch: 18
  • Material: A307 Grade A Plain Steel
  • Finish: Plain
  • Thread Style: Fully Threaded
  • Pack Quantity: 750
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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 (4.8 / 5 · 5 reviews)

Lily ★★★★★

The square neck on these 5/16-18 bolts grabbed the wood perfectly on my deck rebuild, no spinning at all. 750 pieces in the pack is plenty for a big project, and the plain steel finish is exactly what I needed for indoor framing.

Nicholas I. ★★★★★

I’ve been using these carriage bolts for a deck repair and the fully threaded design made installation much smoother than the partial-thread ones I’ve used before. The square neck really bites into the wood and keeps everything from spinning during tightening.

Steven D. ★★★★★

The square neck on these carriage bolts really locks into the wood perfectly, so I didn't need a wrench on the head during installation. For the price, getting 750 bolts this consistent in quality is a solid deal for any framing or deck project.