Mutual Screw & Supply

1/4-20 X 2-1/2" Hex Machine Bolts | Steel Hot-Dip Galvanized | Partially Threaded (50 / Pkg.)

1/4-20 X 2-1/2" Hex Machine Bolts | Steel Hot-Dip Galvanized | Partially - Main image
$6.2 $9.84 In stock

1/4-20 X 2-1/2" Hex Machine Bolts in Steel Hot-Dip Galvanized. A hex head machine bolt with a partially threaded shank per ASME B18.2.1, providing an unthreaded grip length for bolted connections through clearance holes.

  • Partially threaded shank for a smooth bearing surface in the shear plane of bolted joints
  • Hex head for wrench-driven, high-torque installation
  • Hot-dip galvanized for heavy-duty outdoor corrosion resistance

Specifications

  • Type: Hex Machine Bolts
  • Head Style: Hex
  • Material: Steel
  • Finish: Hot-Dip Galvanized
  • Thread Size: 1/4-20
  • Length: 2-1/2"
  • Thread: Partially Threaded
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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)

Zoe F. ★★★★★

The unthreaded grip length made lining up the bracket much easier than with fully threaded bolts—no more cross-threading. These galvanized hex heads held tight without slipping once torqued.

Kevin R. ★★★★★

The hex head grabbed my socket wrench cleanly, and that hot-dip galvanized coating looks like it’ll shrug off rain for years. I used a dozen on a fence gate frame, and the unthreaded grip section seated the wood tight without any wobble. Exactly what I needed for a solid, rust-resistant joint.

Alexander ★★★★★

I’m replacing old galvanized fasteners for an outdoor pergola, and these 2-1/2-inch hex bolts fit perfectly with the unthreaded grip section keeping things snug. The hot-dip coating looks thick and uniform, which should hold up to the weather here.