Mutual Screw & Supply

1/4-20 X 3-1/2" Carriage Bolts | Fully Threaded | 316 Stainless Steel (50 / Pkg.)

1/4-20 X 3-1/2" Carriage Bolts | Fully Threaded | 316 Stainless Steel (50 / - Main image
$11.29 $17.92 In stock

1/4-20 X 3-1/2" 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: 1/4-20
  • Length: 3-1/2"
  • Threads Per Inch: 20
  • Material: 316 Stainless Steel
  • Finish: Plain
  • Thread Style: Fully Threaded
  • Pack Quantity: 50
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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 (4.2 / 5 · 5 reviews)

Brian B. ★★★★★

Bought these for a marine dock repair and the 316 stainless steel held up perfectly against the saltwater spray during the first storm. The rounded head sits flush on the wood, and the square neck kept them from spinning while I tightened everything down.

Lily ★★★★★

The square neck grabbed perfectly in the wood on my dock project, and the full threading is great for stainless. These bolts should hold up for years outdoors in the salt air.

Chloe ★★★★☆

The 316 stainless steel feels like it will hold up well outdoors, and the square neck does a good job keeping them from spinning as I tighten them. Only wish the package had a few more bolts for the price.