Mutual Screw & Supply

3/8-16 X 2-1/4" Hex Machine Bolts | Steel Zinc Plated | Partially Threaded (50 / Pkg.)

3/8-16 X 2-1/4" Hex Machine Bolts | Steel Zinc Plated | Partially Threaded (50 - Main image
$8.2 $13.23 In stock

3/8-16 X 2-1/4" 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: 2-1/4"
  • 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 (4.4 / 5 · 5 reviews)

Steven C. ★★★★★

The zinc plating looks even and clean, and the partially threaded shank gave me a solid grip length for a tight frame joint I was bolting. All 50 came in the box with no bent threads, which is more than I can say for other hardware packs I've ordered.

Evelyn U. ★★★★★

The unthreaded grip section made aligning these bolts in my steel frame a breeze, no cross-threading. They look clean with the zinc plating and the 50-pack gives me plenty of spares for future projects.

Grace O. ★★★★★

The hex heads fit my socket perfectly, and the zinc coating looks clean and resistant to rust. I used these for fastening a steel bracket, and the unthreaded grip length made alignment much easier.