Mutual Screw & Supply

M3-0.5 X 40mm Socket Cap Screws | Hex Socket Drive | Fully Threaded | 316 Stainless Steel (400 / Pkg.)

M3-0.5 X 40mm Socket Cap Screws | Hex Socket Drive | Fully Threaded | 316 - Main image
$25.09 $39.2 In stock

These M3-0.5 x 40mm socket cap screws are manufactured from 316 Stainless Steel, featuring a hex socket drive. They are well suited to machinery, tooling, jigs, and precision assemblies.

  • Material and finish: 316 Stainless Steel
  • 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
  • Material: 316 Stainless Steel
  • Finish: Plain
  • Grade: 316
  • Drive type: Hex Socket Drive
  • Thread style: Fully Threaded
  • Thread size: M3-0.5
  • Length: 40mm
  • Measurement type: Metric
  • Pack quantity: 400 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 (4.8 / 5 · 5 reviews)

Samuel C. ★★★★★

The hex socket drive grips the Allen key perfectly, and the 316 stainless finish is smooth with no burrs. I used these in a jig build and all 400 seated cleanly without a single stripped thread.

Alexander O. ★★★★★

Wanted some decent 316 stainless for a small robotics jig, and these fully threaded 40mm screws fit perfectly. They drove in smooth without any galling, and the hex socket held tight with no stripping.

Stella ★★★★★

The hex socket drive on these M3s bites perfectly with my Allen key, no stripping even when I torqued them down tight on a jig. The 316 stainless finish looks clean and feels solid—40mm length gave me just enough thread engagement for a 12mm plate stack.