1/4"-20 X 3-1/2" Machine Screws | Round Head | Combination Drive | Steel Zinc Plated (100/Pkg.)

★★★★★ 4.3 149 reviews

US$6.40
Price when purchased online
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US$6.40
Price when purchased online
Free shipping Free 30-day returns

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Product details

Management number 242058177 Release Date 2026/07/19 List Price US$6.40 Model Number 242058177
Category

Machine Screws – Round Head, Steel, Zinc-Plated (1/4-20 x 3-1/2 in). These durable fasteners are designed for secure metal-to-metal assemblies and a wide range of DIY projects.

Featuring a round head for a clean, low-profile finish and a zinc-plated coating for corrosion resistance, these machine screws excel in machinery, enclosures, cabinets, and other metalwork where dependable fastening matters.

  • Round head design provides a smooth profile and easy drive access.
  • Steel construction delivers high strength and long-lasting performance.
  • Zinc-plated finish offers corrosion resistance in indoor and covered outdoor environments.
  • Size and thread 1/4-20 coarse thread (UNC) for reliable engagement with common metal substrates.
  • Length 3-1/2 inches to suit thicker parts and deeper assemblies.

Specifications

  • Size: 1/4-20 x 3-1/2 in
  • Material: Steel
  • Finish: Zinc-plated
  • Head type: Round
  • Thread type: Coarse (1/4-20 UNC)

Perfect for professional repair, maintenance, and new-build projects, these machine screws combine strength, durability, and easy installation for reliable results every time.


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4.3 out of 5
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149 ratings | 61 reviews
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