Mutual Screw & Supply

HOLO-KROME 72117 1/4-20 X 3-1/2" Socket Cap Screws | Hex Socket Drive | Alloy Steel Thermal Black Oxide (100 / Pkg.)

HOLO-KROME 72117 1/4-20 X 3-1/2" Socket Cap Screws | Hex Socket Drive | Alloy - Main image
$57.57 $88.57 In stock

These 1/4-20 x 3-1/2" socket cap screws are manufactured from Alloy Steel Thermal Black Oxide, featuring a socket drive. They are well suited to machinery, tooling, jigs, and precision assemblies.

  • Material and finish: Alloy Steel Thermal Black Oxide
  • Drive: Socket Drive
  • Thread size: 1/4-20
  • Length: 3-1/2"
  • Applications: Machinery, tooling, jigs, and precision assemblies

Specifications

  • Product type: Socket Cap Screws
  • Material: Alloy Steel
  • Finish: Thermal Black Oxide
  • Drive type: Socket Drive
  • Thread size: 1/4-20
  • Length: 3-1/2"
  • Threads per inch: 20
  • Measurement type: Inch
  • Pack quantity: 100 per package
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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 (4.6 / 5 · 5 reviews)

Hazel ★★★★★

The black oxide finish on these 1/4-20 screws looks great and hasn't chipped at all during assembly of my latest jig. They threaded smoothly into tapped holes without any binding, which was a relief.

Isabella ★★★★★

Finally got around to installing these in a jig I'm building and the black oxide finish held up well to a bit of oil and handling. The hex drive engaged perfectly with no stripping, even after a few adjustments.

Michael D. ★★★★★

Finally found some decent length socket cap screws that don't strip out on me. The black oxide finish on these 1/4-20 x 3-1/2" ones feels really tough and they seat perfectly in my jig setup.