Mutual Screw & Supply

1/4-20 X 1/2" Carriage Bolts | Fully Threaded | A307 Grade A Zinc Plated Steel (500 / Pkg.)

1/4-20 X 1/2" Carriage Bolts | Fully Threaded | A307 Grade A Zinc Plated Steel - Main image
$10.65 $15.44 In stock

1/4-20 X 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: 1/2"
  • Threads Per Inch: 20
  • Material: A307 Grade A Zinc Plated Steel
  • Finish: Zinc Plated
  • Thread Style: Fully Threaded
  • Pack Quantity: 250
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Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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 (4.4 / 5 · 5 reviews)

Andrew M. ★★★★★

The square neck under the head grabbed perfectly into the wood without any slipping, and the zinc coating looks clean and uniform across all 500 pieces. Exactly what I needed for securing outdoor furniture frames.

Sophia ★★★★★

Used these for building a heavy-duty workbench and the fully threaded shanks made them really easy to tighten down without spinning. Nice, uniform plating without any bare spots—exactly what I needed for outdoor furniture repairs.

Miles ★★★★★

The square neck under the head grabbed the wood immediately when I tightened these down — no spinning, no swearing. The zinc plating looks clean and uniform across the whole box of 500. Exactly what I needed for a shelf build that's going to see some use.