Mutual Screw & Supply

1/4-20 X 3" Socket Cap Screws | Flat Head Hex Socket Drive | Partially Threaded | Alloy Steel Thermal Black Oxide (100 / Pkg.)

1/4-20 X 3" Socket Cap Screws | Flat Head Hex Socket Drive | Partially Threaded - Main image
$29.56 $49.27 In stock

These 1/4-20 x 3" socket cap screws are manufactured from Alloy Steel Thermal Black Oxide, featuring a hex socket drive. They are well suited to machinery, tooling, jigs, and precision assemblies.

  • Material and finish: Alloy Steel Thermal Black Oxide
  • Head style: Flat Head
  • Drive: Hex Socket Drive
  • Thread style: Partially Threaded
  • Thread size: 1/4-20
  • Length: 3"
  • Applications: Machinery, tooling, jigs, and precision assemblies

Specifications

  • Product type: Socket Cap Screws
  • Head style: Flat Head
  • Material: Alloy Steel
  • Finish: Thermal Black Oxide
  • Drive type: Hex Socket Drive
  • Thread style: Partially Threaded
  • Thread size: 1/4-20
  • Length: 3"
  • Threads per inch: 20
  • Measurement type: Inch
  • Pack quantity: 100 per package
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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)

Sofia S. ★★★★★

The hex socket drive made tightening these in tight spots on my jig much easier than using regular bolts. The partial threading gave me just enough grip for the material I was working with.

Abigail C. ★★★★★

I’m using these to build a custom jig setup, and the flat head design sits flush perfectly in my counterbored holes. The black oxide coating has held up well so far without any rust spots, even in my damp garage.

Avery ★★★★★

I needed some partially threaded fasteners for a jig I'm building, and these 1/4-20 x 3" screws fit the bill perfectly—the black oxide coating gives them a nice, uniform finish. They drive smoothly with a hex key and hold tight.