Mutual Screw & Supply

1/4-20 X 3" Carriage Bolts | Fully Threaded | A307 Grade A Plain Steel (750 / Pkg.)

1/4-20 X 3" Carriage Bolts | Fully Threaded | A307 Grade A Plain Steel (750 / - Main image
$55.01 $75.35 In stock

1/4-20 X 3" 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: 1/4-20
  • Length: 3"
  • Threads Per Inch: 20
  • Material: A307 Grade A Plain Steel
  • Finish: Plain
  • Thread Style: Fully Threaded
  • Pack Quantity: 750
Before you pay

Check the method and total at checkout.

When it ships

Allow for processing time as well as the journey to you.

Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

View policy
If you need a refund

Keep your order number and contact the store to start.

Please contact us for the refund processing timeframe before returning an item.

View policy
Delivery costs

Review the cost for your destination and chosen service.

Standard Shipping · United States: $0.00

Express Shipping · United States: $3.99

View policy
Returning an item

Check the return conditions before sending anything back.

United States · Return window (days after delivery): 30. Return method: By mail. Return postage: Seller pays.

View policy

Customer Reviews (4.4 / 5 · 5 reviews)

John N. ★★★★★

Ordered these for a framing project and the 3-inch length was exactly what I needed for sandwiching 2x4s. The square neck seated perfectly into the wood with no spinning, even with a wrench cranking down on them. A full 750 count for this price is hard to beat.

Penelope K. ★★★★★

These bolts are solid, the threads are clean and consistent across all 750 pieces, which saved me a ton of time sorting. The rounded head sits flush against the wood just as I needed for my deck project.

Adam ★★★★★

The square neck grabbed the wood instantly when I torqued them down, so no spinning or stripped heads on my deck repair. All 750 came in one box with clean threads, and the plain steel finish is exactly what I needed for a dry, interior job.