Mutual Screw & Supply

M20-2.5 X 40mm Socket Cap Screws | Flat Head Hex Socket Drive | Fully Threaded | Class 10.9 Alloy Steel Thermal Black Oxide (25 / Pkg.)

M20-2.5 X 40mm Socket Cap Screws | Flat Head Hex Socket Drive | Fully Threaded - Main image
$40.83 $55.17 In stock

These M20-2.5 x 40mm 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: M20-2.5
  • Length: 40mm
  • 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: M20-2.5
  • Length: 40mm
  • 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 (5.0 / 5 · 5 reviews)

Brian C. ★★★★★

Needed a solid bolt for a heavy jig I’m building, and these fully threaded M20s threaded in smoothly with no binding. The thermal black oxide finish seems like it’ll hold up well on the shop floor.

Steven ★★★★★

The hex socket drive fit my driver perfectly without slipping, and the fully threaded body made alignment on a heavy jig much easier than I expected. These feel solid for precision assemblies—no wobble or play at all.

Stella ★★★★★

The black oxide finish on these screws looks clean and professional on my assembly fixtures. The hex socket drive made installation straightforward with no cam-out issues.