Mutual Screw & Supply

M3-0.5 X 30mm Socket Cap Screws | Flat Head Hex Socket Drive | Partially Threaded | Class 12.9 Alloy Steel Zinc Plated (400 / Pkg.)

M3-0.5 X 30mm Socket Cap Screws | Flat Head Hex Socket Drive | Partially - Main image
$42.82 $57.86 In stock

These M3-0.5 x 30mm socket cap screws are manufactured from Alloy Steel Zinc Plated, featuring a hex socket drive. They are well suited to machinery, tooling, jigs, and precision assemblies.

  • Material and finish: Alloy Steel Zinc Plated
  • Head style: Flat Head
  • Drive: Hex Socket Drive
  • Thread style: Partially Threaded
  • Thread size: M3-0.5
  • Length: 30mm
  • Applications: Machinery, tooling, jigs, and precision assemblies

Specifications

  • Product type: Socket Cap Screws
  • Head style: Flat Head
  • Material: Alloy Steel
  • Finish: Zinc Plated
  • Grade: Class 12.9 CR+3
  • Drive type: Hex Socket Drive
  • Thread style: Partially Threaded
  • Thread size: M3-0.5
  • Length: 30mm
  • Measurement type: Metric
  • Pack quantity: 400 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 (4.6 / 5 · 5 reviews)

John ★★★★★

Used a full pack to bolt down a batch of hardened steel fixture plates on my mill. The partially threaded shank made alignment much easier, and so far they’ve held torque perfectly through heavy cuts.

Ruby Y. ★★★★★

Installed these on a small CNC jig I'm building and the 12.9 alloy steel is noticeably tougher than standard cap screws—no rounding out at all. The partially threaded shank also gave me a cleaner grip for the clamping depth I needed.

Zoe ★★★★★

For a precision robotics fixture I was building, the hex socket drive made installation in tight spots much easier compared to Phillips heads. The 12.9 alloy steel feels incredibly tough, and the zinc plating looks clean and consistent across all 400 pieces.