Mutual Screw & Supply

HOLO-KROME 730001440 5/16-24 X 3" Socket Cap Screws | Hex Socket Drive | Alloy Steel Thermal Black Oxide (100 / Pkg.)

HOLO-KROME 730001440 5/16-24 X 3" Socket Cap Screws | Hex Socket Drive | Alloy - Main image
$70.59 $98.04 In stock

These 5/16-24 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: 5/16-24
  • 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: 5/16-24
  • Length: 3"
  • Threads per inch: 24
  • Measurement type: Inch
  • Pack quantity: 100 per package
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Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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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)

Adam ★★★★★

Installing these in a jig today and the 5/16-24 threads cut clean right from the start. The 3" length was exactly what I needed for a thick plate, and the black oxide finish resists scuffs better than bare steel.

Eli J. ★★★★★

The black oxide finish on these screws looks professional and held up well during assembly. They threaded smoothly into my jig without any binding, and the 3-inch length was exactly what I needed for my setup.

John Y. ★★★★★

I needed some longer socket cap screws for a jig I was building, and these 3" alloy steel ones threaded perfectly into my fixture plate. The hex socket drive made installation much easier than dealing with a stripped phillips head.