Mutual Screw & Supply

M3-0.5 X 20mm Socket Cap Screws | Flat Head Hex Socket Drive | Fully Threaded | Class 12.9 Alloy Steel Thermal Black Oxide (400 / Pkg.)

M3-0.5 X 20mm Socket Cap Screws | Flat Head Hex Socket Drive | Fully Threaded | - Main image
$30.06 $40.62 In stock

These M3-0.5 x 20mm 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: 20mm
  • 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: 20mm
  • Measurement type: Metric
  • Pack quantity: 400 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 (5.0 / 5 · 5 reviews)

David N. ★★★★★

I needed a batch of precision fasteners for a jig setup, and these M3x20mm hex socket screws threaded perfectly into the aluminum without any binding. The 400-count pack is great value for tooling projects.

Hannah U. ★★★★★

The black oxide finish on these screws makes them slide into tight spots without binding, which saved me time while assembling a fixture. The socket drive feels precise even at the M3 size, and the whole pack of 400 was uniformly threaded.

Christopher G. ★★★★★

Installing these into aluminum jig fixtures was effortless — the hex socket engaged cleanly without any wobble. A full 400 screws per pack is generous for the price.