Mutual Screw & Supply

HOLO-KROME 77474 1/4-28 X 2-1/2" Socket Cap Screws | Hex Socket Drive | Alloy Steel Thermal Black Oxide (100 / Pkg.)

HOLO-KROME 77474 1/4-28 X 2-1/2" Socket Cap Screws | Hex Socket Drive | Alloy - Main image
$42.23 $62.11 In stock

These 1/4-28 x 2-1/2" 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: 1/4-28
  • Length: 2-1/2"
  • 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: 1/4-28
  • Length: 2-1/2"
  • Threads per inch: 28
  • 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 (5.0 / 5 · 5 reviews)

Zoe ★★★★★

These 1/4-28 screws felt solid when I torqued them down on a jig fixture, and the hex socket drive gripped perfectly without any stripping. Exactly what I needed for precision assembly work.

Samuel H. ★★★★★

The black oxide finish on these screws is a nice touch—they slide into tapped holes without binding, and the hex socket drive grabs cleanly every time. I’ve used a handful on a jig so far and they hold up exactly as expected for precision work.

Andrew ★★★★★

Used these to rebuild a worn-out fixture at work, and the thermal black oxide finish holds up way better than the zinc-plated stuff I usually grab. The hex socket drive seated perfectly with no stripping, and all 100 came out of the box clean and consistent.