Mutual Screw & Supply

HOLO-KROME 86580 1/4-20 X 3-3/4" Socket Cap Screws | Hex Socket Drive | Alloy Steel Thermal Black Oxide (100 / Pkg.)

HOLO-KROME 86580 1/4-20 X 3-3/4" Socket Cap Screws | Hex Socket Drive | Alloy - Main image
$67.12 $104.88 In stock

These 1/4-20 x 3-3/4" 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: 3-3/4"
  • 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: 3-3/4"
  • 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 (5.0 / 5 · 5 reviews)

Penelope ★★★★★

Used a full box assembling a custom machine table and every single screw threaded smoothly without any binding. The black oxide finish looks clean and professional, plus the heads didn’t strip when torqued down with a hex driver.

Henry ★★★★★

Had to swap out the old bolts on a fixture at work, and these threaded in smoothly without any binding. The black oxide finish looks really clean and seems like it'll resist rust better than the plain steel ones I've used before.

Harper ★★★★★

Installed these in a jig I’m building and the black oxide finish held up great against the clamping force. The threads cut cleanly into pre-tapped holes without binding, and the 3-3/4" length gave me exactly the engagement I needed for a thicker fixture plate.