Mutual Screw & Supply

M3-0.5 X 40mm Socket Cap Screws | Flat Head Hex Socket Drive | Partially Threaded | Class 12.9 Alloy Steel Zinc Plated (200 / Pkg.)

M3-0.5 X 40mm Socket Cap Screws | Flat Head Hex Socket Drive | Partially - Main image
$24.23 $39.72 In stock

These M3-0.5 x 40mm 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: Partially Threaded
  • Thread size: M3-0.5
  • Length: 40mm
  • 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: Partially Threaded
  • Thread size: M3-0.5
  • Length: 40mm
  • Measurement type: Metric
  • Pack quantity: 200 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)

Christopher H. ★★★★★

I needed partially threaded M3-40s for a jig build, and these hex socket drive screws fit perfectly. The 12.9 alloy steel feels much sturdier than the usual stainless ones, and the zinc plating hasn't chipped during tightening.

Jason ★★★★★

Finally, some M3 screws that actually hold a thread without chewing up the aluminum every time I assemble my jigs. The 12.9 alloy steel feels rock solid and the zinc plating looks even all over, no flaking after a few weeks of use.

Elizabeth ★★★★★

The hex drive bites cleanly without stripping, which is exactly what I needed for tight spaces in a jig setup. Zinc plating looks uniform and the 12.9 alloy steel feels plenty rigid for the price. One minor nit: the bag doesn’t reseal, but at 200 pieces I’m not complaining.