Mutual Screw & Supply

1/4-20 X 3" Hex Machine Bolts | Steel Zinc Plated | Partially Threaded (200 / Pkg.)

1/4-20 X 3" Hex Machine Bolts | Steel Zinc Plated | Partially Threaded (200 / - Main image
$6.5 $10 In stock

1/4-20 X 3" 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: 1/4-20
  • Length: 3"
  • Thread: Partially Threaded
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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 (5.0 / 5 · 5 reviews)

Sofia ★★★★★

Finally ordered a full box of these instead of running to the hardware store every other week. The zinc plating looks clean and even, and the partial threading gave me a solid grip when I bolted two steel plates together. Exactly what I needed for the price.

Violet I. ★★★★★

The unthreaded grip section on these bolts made aligning my steel brackets so much easier, no fighting threads halfway through the connection. The zinc plating looks uniform and hasn't shown a speck of rust after a few rainy days outdoors. For a 200-pack, the price is hard to beat.

Isabella ★★★★★

The threads are clean and the zinc coating looks uniform across all 200 bolts, which made them easy to run a die over for a custom fitting. The partially threaded shank gave me that solid grip length I needed for a steel bracket assembly, and the hex heads seated perfectly with a standard wrench.