Mutual Screw & Supply

#10-24 X 3-1/4" Carriage Bolts | Fully Threaded | A307 Grade A Plain Steel (300 / Pkg.)

#10-24 X 3-1/4" Carriage Bolts | Fully Threaded | A307 Grade A Plain Steel (300 - Main image
$13.46 $19.5 In stock

#10-24 X 3-1/4" 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: #10-24
  • Length: 3-1/4"
  • Threads Per Inch: 24
  • Material: A307 Grade A Plain Steel
  • Finish: Plain
  • Thread Style: Fully Threaded
  • Pack Quantity: 100
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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)

Owen I. ★★★★★

I needed these for a quick deck repair and the square neck grabbed perfectly into the wood, no slipping while I tightened them. The full threading gave me plenty of grip on the nut side, and the plain steel finish looks clean for a basic outdoor project.

Leo N. ★★★★★

The full threading goes all the way up to the head, making these much easier to drive than the partially threaded ones I've used before. Not a single stripped bolt in the whole package of 300.

Zoe C. ★★★★★

The square neck under the head really digs in tight when you wrench it down—no spinning at all. Got the 300-pack for a fencing job and every single one threaded cleanly into the wood, zero duds. Plain steel finish means I’ll need to oil them for outdoor use, but for the price, these are solid.