Mutual Screw & Supply

M20-2.5 X 55mm Socket Cap Screws | Flat Head Hex Socket Drive | Fully Threaded | Class 12.9 Alloy Steel Zinc Plated (25 / Pkg.)

M20-2.5 X 55mm Socket Cap Screws | Flat Head Hex Socket Drive | Fully Threaded - Main image
$72.08 $97.41 In stock

These M20-2.5 x 55mm 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: Fully Threaded
  • Thread size: M20-2.5
  • Length: 55mm
  • 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: Fully Threaded
  • Thread size: M20-2.5
  • Length: 55mm
  • Measurement type: Metric
  • Pack quantity: 25 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)

Elizabeth ★★★★★

The hex drive on these socket cap screws fits my hex key perfectly with no slipping—a nice change from lesser grades. Used them to secure a heavy jig in my shop and they haven't budged. The zinc plating gives good corrosion resistance for the price.

Andrew G. ★★★★★

Finally, a proper 12.9-grade bolt that doesn’t strip when I torque it down on my jig—the zinc plating also hasn’t chipped after a week of clamping. These M20s fit perfectly in my precision assembly, and the flat head sits flush without any fiddling.

Grace V. ★★★★★

Used these to rebuild a jig at work, and the 12.9 alloy steel held up perfectly under heavy torque. The hex socket drive made installation quick with no stripping, even in tight spots.