Mutual Screw & Supply

#4-40 X 3/8" Socket Cap Screws | Hex Socket Drive | Alloy Steel (200 / Pkg.)

#4-40 X 3/8" Socket Cap Screws | Hex Socket Drive | Alloy Steel (200 / Pkg.) - Main image
$13.66 $19.8 In stock

These #4-40 x 3/8" socket cap screws are manufactured from Alloy Steel, featuring a hex socket drive. They are well suited to machinery, tooling, jigs, and precision assemblies.

  • Material and finish: Alloy Steel
  • Drive: Hex Socket
  • Thread size: #4-40
  • Length: 3/8"
  • Applications: Machinery, tooling, jigs, and precision assemblies

Specifications

  • Product type: Socket Cap Screws
  • Material: Alloy Steel
  • Finish: Plain
  • Drive type: Hex Socket
  • Thread size: #4-40
  • Length: 3/8"
  • Threads per inch: 40
  • Measurement type: Imperial
  • Pack quantity: 50 per package

Please note: This item is excess stock and is sold non-cancelable, non-refundable, and non-returnable. Please call us with any questions about this item before ordering.

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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 (5.0 / 5 · 5 reviews)

Kevin ★★★★★

These #4-40 screws are exactly what I needed for a small tooling project—the hex socket drive made installation easy with my Allen wrench. The alloy steel feels sturdy, and the 200-count pack is great value for the price.

James ★★★★★

I needed tiny fasteners for a jig I’m building, and these alloy steel screws fit perfectly without any stripping. The 200-count package is great value for precise assembly work.

Henry L. ★★★★★

The hex socket drive grips the Allen key perfectly, making these tiny screws easy to install in tight spots on my tooling jig. They feel sturdy enough for repeated adjustments without stripping.