Mutual Screw & Supply

M16-2 X 40mm Socket Cap Screws | Button Head Hex Socket Drive | Fully Threaded | Class 12.9 Alloy Steel Thermal Black Oxide (50 / Pkg.)

M16-2 X 40mm Socket Cap Screws | Button Head Hex Socket Drive | Fully Threaded - Main image
$56.95 $94.91 In stock

These M16-2 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: Button Head
  • Drive: Hex Socket Drive
  • Thread style: Fully Threaded
  • Thread size: M16-2
  • Length: 40mm
  • Applications: Machinery, tooling, jigs, and precision assemblies

Specifications

  • Product type: Socket Cap Screws
  • Head style: Button Head
  • Material: Alloy Steel
  • Finish: Thermal Black Oxide
  • Grade: Class 12.9
  • Drive type: Hex Socket Drive
  • Thread style: Fully Threaded
  • Thread size: M16-2
  • Length: 40mm
  • Measurement type: Metric
  • Pack quantity: 50 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 (4.8 / 5 · 5 reviews)

Richard R. ★★★★★

These bolts hold firm on my milling jig with no wobble at all. The hex socket drive makes installation easy even in tight spots, and the black oxide finish seems to resist oil staining so far.

Ryan P. ★★★★★

The black oxide finish on these M16 screws held up perfectly in my press tooling setup—no galling after repeated tightening. For a hardened 12.9-grade cap screw at this price, the hex drive engagement feels solid and precise.

Kevin ★★★★★

The black oxide finish on these screws looks clean and professional, and the hex socket drive made installation a breeze with my torque wrench. I used them to secure a heavy jig on my milling machine, and the 12.9 grade steel feels incredibly solid under load.