Mutual Screw & Supply

5/16-18 X 5/8" Carriage Bolts | Fully Threaded | 316 Stainless Steel (100 / Pkg.)

5/16-18 X 5/8" Carriage Bolts | Fully Threaded | 316 Stainless Steel (100 / - Main image
$15.38 $23.66 In stock

5/16-18 X 5/8" Carriage Bolts in 316 Stainless 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
  • 316 Stainless Steel construction
  • Coarse thread for use in wood and with nuts and washers
  • Fully Threaded
  • Sold in bulk packs

Specifications

  • Thread Size: 5/16-18
  • Length: 5/8"
  • Threads Per Inch: 18
  • Material: 316 Stainless Steel
  • Finish: Plain
  • Thread Style: Fully Threaded
  • Pack Quantity: 100
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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 (4.6 / 5 · 5 reviews)

Victoria ★★★★★

The square neck grabbed the wood right away, so no spinning or fussing while I tightened them down. These 316 stainless bolts feel solid and the fully threaded shaft makes setting them in thick lumber a breeze.

John O. ★★★★★

The rounded heads sit flush and clean, and the square neck grabs the wood so tightly I didn't need a wrench to hold them in place. All 100 arrived with no burrs or defects, and the 316 stainless finish gives them a nice weight. These will outlast the deck they're going into.

Leo ★★★★★

The square neck locked perfectly into the wood on my dock repair, no spinning at all. These 316 stainless bolts feel solid and should hold up great against the saltwater.