Mutual Screw & Supply

M8-1.25 X 340mm Socket Cap Screws | Hex Socket Drive | Partially Threaded | Class 12.9 Alloy Steel Thermal Black Oxide (5 / Pkg.)

M8-1.25 X 340mm Socket Cap Screws | Hex Socket Drive | Partially Threaded | - Main image
$25.28 $36.11 In stock

These M8-1.25 x 340mm 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
  • Drive: Hex Socket Drive
  • Thread style: Partially Threaded
  • Thread size: M8-1.25
  • Length: 340mm
  • Applications: Machinery, tooling, jigs, and precision assemblies

Specifications

  • Product type: Socket Cap Screws
  • Material: Alloy Steel
  • Finish: Thermal Black Oxide
  • Grade: Class 12.9
  • Drive type: Hex Socket Drive
  • Thread style: Partially Threaded
  • Thread size: M8-1.25
  • Length: 340mm
  • Measurement type: Metric
  • Pack quantity: 5 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)

Chloe W. ★★★★★

The black oxide finish gives these a solid, professional look, and the hex socket drive seated perfectly with my Allen key without any wobble. Threads are clean and sharp, so they grabbed right away in the jig I'm building.

Joseph ★★★★★

Finally found the right length to mount a motor mount on my milling machine. The partially threaded shank gives just enough grip without bottoming out in the blind hole. These should hold up under heavy cutting loads.

Daniel ★★★★★

These 12.9 alloy steel screws are the real deal for heavy-duty jig work—the thermal black oxide finish looks clean and seems tough. The 340mm length was exactly what I needed for a deep fixture assembly, and the hex socket drive made installation straightforward without stripping.