Mutual Screw & Supply

5/16-18 X 1-1/2" Carriage Bolts | Fully Threaded | 316 Stainless Steel (100 / Pkg.)

5/16-18 X 1-1/2" Carriage Bolts | Fully Threaded | 316 Stainless Steel (100 / - Main image
$21.06 $31.44 In stock

5/16-18 X 1-1/2" 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: 1-1/2"
  • Threads Per Inch: 18
  • Material: 316 Stainless Steel
  • Finish: Plain
  • Thread Style: Fully Threaded
  • Pack Quantity: 100
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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 (4.8 / 5 · 5 reviews)

Nicholas ★★★★★

The square neck on these carriage bolts grabbed perfectly into the pressure-treated wood, and the 316 stainless finish feels like it will hold up to coastal weather without rusting.

Mia O. ★★★★★

Installed a deck railing this weekend and these fully threaded 316 bolts didn’t spin a single time once I torqued them down. The square neck seats perfectly, and the stainless finish already looks better than the galvanized ones I used last year.

Julian ★★★★★

The square neck on these grabbed the wood perfectly on my dock repair, no slipping or spinning. The 316 stainless feels heavy-duty and should hold up to the saltwater.