Mutual Screw & Supply

1/2-13 X 3-1/2" Carriage Bolts | Fully Threaded | A307 Grade A Plain Steel (50 / Pkg.)

1/2-13 X 3-1/2" Carriage Bolts | Fully Threaded | A307 Grade A Plain Steel (50 - Main image
$15.69 $24.9 In stock

1/2-13 X 3-1/2" 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: 1/2-13
  • Length: 3-1/2"
  • Threads Per Inch: 13
  • 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 (5.0 / 5 · 5 reviews)

Leo ★★★★★

Bought these for a pergola build and the square neck grabbed the wood instantly, no spinning while I torqued them down. The fully threaded shaft made it easy to cut a few shorter without losing any grip. Solid pack of 50 for the price, all heads were clean and uniform.

Emily ★★★★★

Needed these for a deck repair and the fully threaded length made it easy to tighten down from the top without any slippage. The square neck seated firmly in the wood, no spinning at all.

Emma ★★★★★

The square neck grabbed the wood perfectly on my fence post repair, zero spinning once I cinched it down. 50 pieces in the pack means I’ve got plenty left for the next project, and the plain steel finish is exactly what you’d expect for the price.