Mutual Screw & Supply

M3-0.5 X 20mm Socket Cap Screws | Flat Head Hex Socket Drive | Fully Threaded | Class 10.9 Alloy Steel Thermal Black Oxide (600 / Pkg.)

M3-0.5 X 20mm Socket Cap Screws | Flat Head Hex Socket Drive | Fully Threaded | - Main image
$33.37 $45.09 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 10.9
  • Drive type: Hex Socket Drive
  • Thread style: Fully Threaded
  • Thread size: M3-0.5
  • Length: 20mm
  • 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 (5.0 / 5 · 5 reviews)

Lucy ★★★★★

The black oxide finish looks sharp on my precision assembly rigs, and the hex socket drive grips firmly without stripping. All 600 pieces are consistently cleanly threaded, so I’ve had zero duds so far.

Alexander A. ★★★★★

For assembling jigs in my workshop, these hex socket screws have consistent threading and the black oxide finish holds up well against minor oil exposure. The class 10.9 strength gives me confidence they won't strip under heavy clamping loads.

Michael ★★★★★

I needed a large batch of M3 screws for a robotics project, and these 20mm ones fit perfectly into the jigs I built—the black oxide coating looks professional and the hex drive is consistent across all 600 pieces.