Mutual Screw & Supply

#4-40 X 5/16" Socket Cap Screws | Hex Socket Drive | Fully Threaded | 316 Stainless Steel (800 / Pkg.)

#4-40 X 5/16" Socket Cap Screws | Hex Socket Drive | Fully Threaded | 316 - Main image
$28.6 $39.18 In stock

These #4-40 x 5/16" 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: #4-40
  • Length: 5/16"
  • 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: #4-40
  • Length: 5/16"
  • Threads per inch: 40
  • Measurement type: Inch
  • Pack quantity: 800 per package
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Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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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Returning an item

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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)

Eva ★★★★★

The hex socket drive made installation so much easier than a standard slotted screw. I used them for a small jig and the 316 stainless feels solid and corrosion-resistant.

Samuel U. ★★★★★

For a small fastener, the hex socket drive gives you way better grip than a Phillips or slotted — no cam-out when you're tightening down on a jig. The 316 stainless steel feels solid and corrosion-resistant, exactly what I needed for outdoor machinery.

Edward L. ★★★★★

I was pleasantly surprised by how consistent the threads are on all 800 of these #4-40 screws. The 316 stainless steel feels solid and should hold up well in my jig assembly without rusting.