Mutual Screw & Supply

HOLO-KROME 730001490 5/16-24 X 4" Socket Cap Screws | Hex Socket Drive | Alloy Steel Thermal Black Oxide (50 / Pkg.)

HOLO-KROME 730001490 5/16-24 X 4" Socket Cap Screws | Hex Socket Drive | Alloy - Main image
$51.53 $72.58 In stock

These 5/16-24 x 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: 5/16-24
  • Length: 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: 5/16-24
  • Length: 4"
  • Threads per inch: 24
  • Measurement type: Inch
  • Pack quantity: 50 per package
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Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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)

Julian ★★★★★

The black oxide finish wiped clean easily and hasn't shown a hint of rust after a week in my damp shop. Drive engagement felt solid all the way down, no wobble even at full torque. Fifty pieces in that little box is a solid value for bench work.

Scarlett ★★★★★

These screws torqued down into my fixture base without any cam-out, and the 4-inch length gave me just enough reach through the spacer block. The black oxide finish is holding up better than the zinc-plated ones I used before.

Avery N. ★★★★★

These black oxide screws look clean and professional once installed. I used them to secure a jig fixture, and the hex socket drive made tightening a lot easier than a standard bolt. The 4-inch length was exactly what I needed.