Mutual Screw & Supply

3/8-16 X 5" Carriage Bolts | Fully Threaded | A307 Grade A Plain Steel (50 / Pkg.)

3/8-16 X 5" Carriage Bolts | Fully Threaded | A307 Grade A Plain Steel (50 / - Main image
$11.98 $17.62 In stock

3/8-16 X 5" 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: 5"
  • Threads Per Inch: 16
  • Material: A307 Grade A Plain Steel
  • Finish: Plain
  • Thread Style: Fully Threaded
  • Pack Quantity: 25
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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)

Ava J. ★★★★★

Had a small deck repair and these carriage bolts did exactly what I needed—the square neck really locked into the pre-drilled hole without spinning, and the 5-inch length was just right for sandwiching two 2x4s. Plain steel finish is fine for indoor use, and the fully threaded shaft made it easy to

Olivia V. ★★★★★

The square neck grabbed tight into the wood just like it should, so I didn't have to waste time fighting with a wrench to keep the bolt from spinning. These 50 bolts all looked clean and straight, and the A307 steel felt solid and sturdy for the heavy shelf brackets I was mounting.

Victoria ★★★★★

Used these for a heavy-duty gate build and the square neck pulled in perfectly, no spinning at all. The plain steel finish was exactly what I expected for the price, and the 50-pack gave me plenty of extras.