Mutual Screw & Supply

1/4-20 X 4-1/2" Carriage Bolts | Fully Threaded | A307 Grade A Zinc Plated Steel (100 / Pkg.)

1/4-20 X 4-1/2" Carriage Bolts | Fully Threaded | A307 Grade A Zinc Plated - Main image
$10.64 $15.88 In stock

1/4-20 X 4-1/2" Carriage Bolts in A307 Grade A Zinc Plated 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 Zinc Plated Steel construction
  • Coarse thread for use in wood and with nuts and washers
  • Fully Threaded
  • Sold in bulk packs

Specifications

  • Thread Size: 1/4-20
  • Length: 4-1/2"
  • Threads Per Inch: 20
  • Material: A307 Grade A Zinc Plated Steel
  • Finish: Zinc Plated
  • Thread Style: Fully Threaded
  • Pack Quantity: 50
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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 (4.6 / 5 · 5 reviews)

George A. ★★★★★

Used these carriage bolts to build a heavy-duty planter box for my front porch. The 4-1/2" length gave me plenty of thread engagement through 2x4s, and the zinc plating still looks clean after a few weeks of rain.

Carter ★★★★★

The square neck under the head locked right into the wood without any spinning, which made installing these a breeze. Finish looks clean and the threads are sharp all the way down.

Evelyn ★★★★★

The square neck under the head grabbed the wood instantly when I torqued them down, so no spinning or cursing mid-project. The zinc plating looks clean and the fully threaded length gave me plenty of bite for a 4x4 joint.