Mutual Screw & Supply

5/16-18 X 3/4" Carriage Bolts | Fully Threaded | 316 Stainless Steel (100 / Pkg.)

5/16-18 X 3/4" Carriage Bolts | Fully Threaded | 316 Stainless Steel (100 / - Main image
$15.62 $22.97 In stock

5/16-18 X 3/4" 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: 3/4"
  • Threads Per Inch: 18
  • Material: 316 Stainless Steel
  • Finish: Plain
  • Thread Style: Fully Threaded
  • Pack Quantity: 100
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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 (5.0 / 5 · 5 reviews)

Elizabeth X. ★★★★★

That square neck under the head locked right into the wood as I tightened them, so I didn't need a second wrench to hold anything still. The 316 stainless finish looks clean and should hold up fine in the damp shed where I used them.

Lily J. ★★★★★

The 316 stainless steel is a big win for outdoor projects—I left them exposed to salt air and there's zero rust after a month. Fully threaded meant I didn't have to hunt for shorter ones on my fence repair, and the square neck grabbed the wood solid the first time. Exactly what I needed.

Sebastian N. ★★★★★

The square neck on these bolts locks right into the wood, making assembly much easier than with standard hex bolts. I used them for a deck repair and the 316 stainless feels solid against the coastal weather.