Mutual Screw & Supply

HOLO-KROME 73144 1/2-20 X 3" Socket Cap Screws | Hex Socket Drive | Alloy Steel Thermal Black Oxide (25 / Pkg.)

HOLO-KROME 73144 1/2-20 X 3" Socket Cap Screws | Hex Socket Drive | Alloy Steel - Main image
$36.44 $51.32 In stock

These 1/2-20 x 3" 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: 1/2-20
  • Length: 3"
  • 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: 1/2-20
  • Length: 3"
  • Threads per inch: 20
  • Measurement type: Inch
  • Pack quantity: 25 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 (4.8 / 5 · 5 reviews)

Sophia ★★★★★

Installing these into a precision assembly was smooth—the hex drive didn't cam out once, and the black oxide finish held up nicely against my oily hands.

Zoe Z. ★★★★★

Used a full box of these on a jig for a production run this week, and every single one seated clean without any thread binding. The black oxide finish held up well against the coolants I had spraying, too. These are my new go-to for precision assemblies.

Grace Z. ★★★★★

The threads on these 1/2-20 screws cut cleanly and seated flush without any binding, and the black oxide finish looks properly done under my work light. I've got them holding a heavy fixture plate now and they haven't budged after a week of vibration.