Mutual Screw & Supply

HOLO-KROME 76040 M3-0.5 X 30mm Socket Cap Screws | Hex Socket Drive | Alloy Steel Thermal Black Oxide (100 / Pkg.)

HOLO-KROME 76040 M3-0.5 X 30mm Socket Cap Screws | Hex Socket Drive | Alloy - Main image
$23.2 $36.25 In stock

These M3-0.5 x 30mm 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: M3-0.5
  • Length: 30mm
  • 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: M3-0.5
  • Length: 30mm
  • Measurement type: Metric
  • Pack quantity: 100 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 (4.8 / 5 · 5 reviews)

Steven U. ★★★★★

The thermal black oxide finish on these M3 screws looks great and seems to resist wear better than my older stainless ones. They thread smoothly into my jig fixtures without any binding.

Andrew D. ★★★★★

I’ve been using these M3 screws for securing aluminum jig plates on the mill, and the black oxide finish holds up well against coolant splashes. The hex drive works perfectly with a ball-end driver, no stripping after multiple tightenings.

Natalie ★★★★★

Threaded cleanly into my 3D printer’s hotend mount without any galling, and the 30mm length gave just enough bite for a snug fit. The black oxide finish seems durable so far; no chips after a few assembly cycles. Solid value for the hundred-pack.