Mutual Screw & Supply

5/16-18 X 7-1/2" Carriage Bolts | A307 Grade A Plain Steel (175 / Pkg.)

5/16-18 X 7-1/2" Carriage Bolts | A307 Grade A Plain Steel (175 / Pkg.) - Main image
$50.13 $78.33 In stock

5/16-18 X 7-1/2" 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: 5/16-18
  • Length: 7-1/2"
  • Threads Per Inch: 18
  • Material: A307 Grade A Plain Steel
  • Finish: Plain
  • Pack Quantity: 175
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)

Andrew Y. ★★★★★

The square neck under the head grabbed the wood perfectly on my playhouse deck frame, so no need to hold them with a wrench. Also nice that a full box of 175 leaves me plenty for future projects.

David ★★★★★

The 7-1/2" length is just right for sandwiching thick lumber on a deck project, and the A307 grade steel feels sturdy enough to handle the torque without stripping.

David ★★★★★

The rounded head sits flush and looks clean, and these bolts drove in without any splitting even on dense oak. Pack of 175 is perfect for my deck project and left me with extras.