Mutual Screw & Supply

M3-0.5 X 40mm Socket Cap Screws | Flat Head Hex Socket Drive | Partially Threaded | Class 10.9 Alloy Steel Thermal Black Oxide (200 / Pkg.)

M3-0.5 X 40mm Socket Cap Screws | Flat Head Hex Socket Drive | Partially - Main image
$24.98 $35.18 In stock

These M3-0.5 x 40mm socket cap screws are manufactured from Alloy Steel Thermal Black Oxide, featuring a hex socket drive. They are well suited to machinery, tooling, jigs, and precision assemblies.

  • Material and finish: Alloy Steel Thermal Black Oxide
  • Head style: Flat Head
  • Drive: Hex Socket Drive
  • Thread style: Partially Threaded
  • Thread size: M3-0.5
  • Length: 40mm
  • Applications: Machinery, tooling, jigs, and precision assemblies

Specifications

  • Product type: Socket Cap Screws
  • Head style: Flat Head
  • Material: Alloy Steel
  • Finish: Thermal Black Oxide
  • Grade: Class 10.9
  • Drive type: Hex Socket Drive
  • Thread style: Partially Threaded
  • Thread size: M3-0.5
  • Length: 40mm
  • Measurement type: Metric
  • Pack quantity: 200 per package
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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)

Henry ★★★★★

The black oxide finish is a nice touch, doesn’t just look better but seems to resist scuffing when I’m sliding them into tight spots. The partial threading gives just the right grip for my precision assembly, and all 200 came in with clean, uniform threads. They seat flush in the countersink without

Joshua R. ★★★★★

I’ve been using these in my mini CNC jigs and the partially threaded design really helps with alignment. The black oxide finish seems durable so far, and the hex drive grips tight without stripping.

Isabella ★★★★★

These flat heads sink perfectly flush in my jig fixtures, and the black oxide finish hasn't chipped off even after repeated tightening. The partial threading gives just the right grip for clamping without bottoming out in the tapped hole.