Mutual Screw & Supply

3/8-16 X 9" Carriage Bolts | A307 Grade A Plain Steel (100 / Pkg.)

3/8-16 X 9" Carriage Bolts | A307 Grade A Plain Steel (100 / Pkg.) - Main image
$48.17 $69.81 In stock

3/8-16 X 9" 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
  • Sold in bulk packs

Specifications

  • Thread Size: 3/8-16
  • Length: 9"
  • Threads Per Inch: 16
  • Material: A307 Grade A Plain Steel
  • Finish: Plain
  • Pack Quantity: 100
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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)

Lily ★★★★★

The square neck under the head really grabbed the wood as I tightened them—no spinning or slipping at all. A307 plain steel feels solid for general outdoor projects, and the 9-inch length gave me plenty of thread for thicker beams. Happy with this batch of 100.

Stella ★★★★★

Had to use a few of these on a fence repair and the square neck seated perfectly into the wood, so no spinning while I tightened the nut. Nine inches gave me plenty of grip for the thick posts, and all 100 came out clean with no bent threads.

Avery Y. ★★★★★

The square neck on these bolts really grabbed the wood tight and didn't slip at all while I was tightening the nut. For a nine-inch length, they feel solid and well-made.