Mutual Screw & Supply

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

1/4-20 X 4-1/2" Carriage Bolts | Fully Threaded | 316 Stainless Steel (50 / - Main image
$18.83 $25.79 In stock

1/4-20 X 4-1/2" 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: 4-1/2"
  • Threads Per Inch: 20
  • Material: 316 Stainless Steel
  • Finish: Plain
  • Thread Style: Fully Threaded
  • Pack Quantity: 50
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Standard Shipping · 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)

Miles ★★★★★

Finally got around to mounting some new railing brackets, and the square neck on these carriage bolts grabbed the wood perfectly so nothing spun while tightening. The 4-1/2 inch length was just right for the 4x4 post I was going through.

Harper J. ★★★★★

Installed these on a dock repair last weekend, and the 316 stainless held up perfectly against the saltwater spray without any rust. The full threading made fastening through thick planks a breeze.

Jacob ★★★★★

The square neck grabbed the wood instantly on the first test piece, no spinning or wrench needed to hold it steady. These fully threaded 4-1/2" shafts gave me plenty of bite for a thick fence rail, and the 316 stainless is a relief knowing they'll shrug off the rain for years.