Mutual Screw & Supply

1/2-13 X 18" Carriage Bolts | A307 Grade A Plain Steel (50 / Pkg.)

1/2-13 X 18" Carriage Bolts | A307 Grade A Plain Steel (50 / Pkg.) - Main image
$80.29 $131.62 In stock

1/2-13 X 18" 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: 1/2-13
  • Length: 18"
  • Threads Per Inch: 13
  • Material: A307 Grade A Plain Steel
  • Finish: Plain
  • Pack Quantity: 50
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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)

Michael P. ★★★★★

The square neck grabs tight on the first sink, no spinning or cursing even when I was wrenching them into green oak. Eighteen inches gives plenty of bite for a 6x6 post, and at fifty per box I’ve got spares for the next fence section.

John ★★★★★

The square neck on these bolts really grabbed into the treated lumber and held tight without spinning at all. I just finished a heavy pergola with them.

Michael W. ★★★★★

Used three of these on a timber frame gate yesterday and the 18" length gave me plenty of thread for a double nut setup. The square neck seated flush without any spinning, which is exactly what you want when you're working alone. Bag of fifty means I won't need to reorder for a while.