Mutual Screw & Supply

3/8-16 X 3-1/4" Carriage Bolts | Fully Threaded | 316 Stainless Steel (50 / Pkg.)

3/8-16 X 3-1/4" Carriage Bolts | Fully Threaded | 316 Stainless Steel (50 / - Main image
$25.33 $41.52 In stock

3/8-16 X 3-1/4" 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: 3/8-16
  • Length: 3-1/4"
  • Threads Per Inch: 16
  • 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 (4.8 / 5 · 5 reviews)

Harper S. ★★★★★

Installing these on a dock repair and the 316 stainless is already proving its worth against the saltwater. The square neck grabbed the wood perfectly without any spinning, made the job much easier than I expected.

Violet N. ★★★★★

These bolts sit perfectly flush once the square neck bites in, and the 316 stainless finish looks clean on my outdoor gate project. The fully threaded length let me cut them down easily where I needed a shorter grip. Fast shipping, solid packaging for fifty pieces.

Sofia ★★★★★

The square neck under the head grabbed into the wood perfectly, so I didn't need a wrench to tighten them down. These are for a dock project by saltwater, and the 316 stainless was exactly what I needed.