Mutual Screw & Supply

3/8-16 X 2-1/4" Carriage Bolts | Fully Threaded | A307 Grade A Plain Steel (625 / Pkg.)

3/8-16 X 2-1/4" Carriage Bolts | Fully Threaded | A307 Grade A Plain Steel (625 - Main image
$74.27 $119.79 In stock

3/8-16 X 2-1/4" 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: 3/8-16
  • Length: 2-1/4"
  • Threads Per Inch: 16
  • Material: A307 Grade A Plain Steel
  • Finish: Plain
  • Thread Style: Fully Threaded
  • Pack Quantity: 625
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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 (4.4 / 5 · 5 reviews)

Hazel ★★★★★

The square neck grabbed perfectly into the wood when I tightened them, no spinning at all. Exactly what I needed for securing heavy brackets.

Andrew J. ★★★★★

Used these for a wooden gate repair and the square neck really dug in tight, no spinning at all. The fully threaded length made it easy to cut down a few with a grinder for a custom fit. Pack of 625 seems overkill but I'll use them up eventually.

Robert O. ★★★★★

The square neck underneath grabbed the wood immediately when I tightened these, so no spinning or wrestling with a wrench while I worked. Ordered the full 625-pack for a fencing project and every single one came out of the box with clean, uniform threads.