Mutual Screw & Supply

3/8-16 X 1-1/4" Hex Machine Bolts | Steel Zinc Plated | Partially Threaded (150 / Pkg.)

3/8-16 X 1-1/4" Hex Machine Bolts | Steel Zinc Plated | Partially Threaded (150 - Main image
$7.4 $10 In stock

3/8-16 X 1-1/4" Hex Machine Bolts in Steel Zinc Plated. 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
  • Zinc plating for everyday corrosion resistance

Specifications

  • Type: Hex Machine Bolts
  • Head Style: Hex
  • Material: Steel
  • Finish: Zinc Plated
  • Thread Size: 3/8-16
  • Length: 1-1/4"
  • 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 (5.0 / 5 · 5 reviews)

Penelope B. ★★★★★

The partially threaded shank made aligning these bolts in my steel brackets much easier than fully threaded ones, and the grip length held firm. Really solid value for a bulk pack.

Avery ★★★★★

The zinc plating on these bolts is a nice touch—it adds a bit of corrosion resistance that gives me peace of mind for outdoor projects. I used a handful to secure a small metal bracket to a wood bench, and the unthreaded grip length kept everything snug without binding.

Charlotte ★★★★★

The partially threaded shank made alignment a breeze when I was assembling a cart frame, and the hex head gave my socket wrench a solid grip. These bolts fit perfectly into pre-drilled holes with no wobble, and the 150-pack is plenty for future projects.