Mutual Screw & Supply

#4-40 X 1-1/4" Socket Cap Screws | Button Head Hex Socket Drive | Fully Threaded | Alloy Steel Thermal Black Oxide (300 / Pkg.)

#4-40 X 1-1/4" Socket Cap Screws | Button Head Hex Socket Drive | Fully - Main image
$30.99 $45.57 In stock

These #4-40 x 1-1/4" 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: Button Head
  • Drive: Hex Socket Drive
  • Thread style: Fully Threaded
  • Thread size: #4-40
  • Length: 1-1/4"
  • Applications: Machinery, tooling, jigs, and precision assemblies

Specifications

  • Product type: Socket Cap Screws
  • Head style: Button Head
  • Material: Alloy Steel
  • Finish: Thermal Black Oxide
  • Drive type: Hex Socket Drive
  • Thread style: Fully Threaded
  • Thread size: #4-40
  • Length: 1-1/4"
  • Threads per inch: 40
  • Measurement type: Inch
  • Pack quantity: 300 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)

Richard ★★★★★

The black oxide finish on these screws looks professional and resists wear well during prototype assembly. The hex socket drive made them easy to install with a standard hex key. Exactly what I needed for building small jigs.

John ★★★★★

I've been using these for fixture assemblies and the black oxide finish has held up well without any rust. The hex socket drive makes installation quick and they thread smoothly into tapped holes.

Michael X. ★★★★★

These little #4-40 screws fit perfectly into my jig setup and the black oxide finish made them easy to handle without slipping. The button head sits flush enough for tight spots, and the hex drive held up without stripping.