Mutual Screw & Supply

3/8-16 X 4-1/2" Carriage Bolts | Fully Threaded | A307 Grade A Plain Steel (250 / Pkg.)

3/8-16 X 4-1/2" Carriage Bolts | Fully Threaded | A307 Grade A Plain Steel (250 - Main image
$54.75 $80.51 In stock

3/8-16 X 4-1/2" 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: 4-1/2"
  • Threads Per Inch: 16
  • Material: A307 Grade A Plain Steel
  • Finish: Plain
  • Thread Style: Fully Threaded
  • Pack Quantity: 250
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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 (4.8 / 5 · 5 reviews)

Henry ★★★★★

I needed carriage bolts for a deck repair, and these fully threaded ones made it easy to get a tight fit without the head spinning. The square neck seated nicely into the wood, and all 250 bolts in the package were consistent in length and thread quality.

Nicholas ★★★★★

The square neck on these bolts grabbed the wood immediately, no spinning while I tightened them down. For the price per piece, having a full 250-count box saved me a trip to the hardware store. Worked perfectly for building a heavy-duty workbench in my garage.

Carter ★★★★★

I needed a full box for a fence repair, and these carriage bolts fit perfectly into the pre-drilled holes without spinning. The rounded head looks clean, and the square neck really locks in place on the wood.