Mutual Screw & Supply

M3-0.5 X 18mm Socket Cap Screws | Flat Head Hex Socket Drive | Fully Threaded | Class 12.9 Alloy Steel Thermal Black Oxide (600 / Pkg.)

M3-0.5 X 18mm Socket Cap Screws | Flat Head Hex Socket Drive | Fully Threaded | - Main image
$30.58 $48.54 In stock

These M3-0.5 x 18mm 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: Fully Threaded
  • Thread size: M3-0.5
  • Length: 18mm
  • 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 12.9
  • Drive type: Hex Socket Drive
  • Thread style: Fully Threaded
  • Thread size: M3-0.5
  • Length: 18mm
  • Measurement type: Metric
  • Pack quantity: 600 per package
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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 (4.6 / 5 · 5 reviews)

Samuel S. ★★★★★

I've used these on a few jigs and they thread cleanly every time, even into tight spots without binding. The 12.9 alloy steel feels seriously solid, and getting 600 of them for this price is a no-brainer for my shop.

Julian ★★★★★

The black oxide finish on these is genuinely smooth, not sticky like some cheaper batches, and the hex socket drives cleanly every time. Sorted a whole jig assembly with the 600 count and every single one threaded true to spec.

William ★★★★★

I needed a strong, reliable fastener for a custom jig build, and the fully threaded design of these M3 screws gave me excellent grip in the thin aluminum plate. The black oxide finish feels durable and hasn't chipped at all during assembly.