Mutual Screw & Supply

M3-0.5 X 40mm Socket Cap Screws | Flat Head Hex Socket Drive | Fully Threaded | 18/8 Stainless Steel (600 / Pkg.)

M3-0.5 X 40mm Socket Cap Screws | Flat Head Hex Socket Drive | Fully Threaded | - Main image
$25.29 $39.52 In stock

These M3-0.5 x 40mm socket cap screws are manufactured from 18/8 Stainless Steel, featuring a hex socket drive. They are well suited to machinery, tooling, jigs, and precision assemblies.

  • Material and finish: 18/8 Stainless Steel
  • Head style: Flat Head
  • Drive: Hex Socket Drive
  • Thread style: Fully 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: 18/8 Stainless Steel
  • Finish: Plain
  • Grade: 18/8
  • Drive type: Hex Socket Drive
  • Thread style: Fully Threaded
  • Thread size: M3-0.5
  • Length: 40mm
  • Measurement type: Metric
  • Pack quantity: 600 per package
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Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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Standard Shipping · United States: $0.00

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)

Charlotte Y. ★★★★★

Forty millimeters of fully threaded 18/8 stainless is exactly what my jig needed, and the hex socket drive bites cleanly without stripping. The whole pack of 600 arrived neatly sorted, which made sorting through them a breeze.

Henry ★★★★★

The hex socket drive on these 18/8 stainless screws gripped the driver perfectly on every single one—no stripped heads across the whole 600-piece batch. I used them for a precision jig build and they threaded smoothly into my tapped holes without binding.

James D. ★★★★★

I needed a solid batch of M3 screws for a custom jig, and these 40mm fully threaded 18/8 stainless steel ones fit the bill perfectly. The flat head sits flush in the counterbore, and the pack of 600 should last me through several projects.