Mutual Screw & Supply

#4-40 X 3" Socket Cap Screws | Button Head Hex Socket Drive | Alloy Steel (2000 / Pkg.)

#4-40 X 3" Socket Cap Screws | Button Head Hex Socket Drive | Alloy Steel (2000 - Main image
$61.78 $93.6 In stock

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

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

Specifications

  • Product type: Socket Cap Screws
  • Material: Alloy Steel
  • Finish: Plain
  • Head style: Button
  • Drive type: Hex Socket
  • Thread size: #4-40
  • Length: 3"
  • Threads per inch: 40
  • Measurement type: Imperial
  • Pack quantity: 2000 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 · 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 (4.6 / 5 · 5 reviews)

John T. ★★★★★

Put these in a custom jig for a precision assembly job I’m running, and the 3-inch length was exactly what I needed to clear a tight mounting plate. The hex socket drive feels solid and the alloy steel seems tough—no stripped heads across the first 500 pieces.

Grace ★★★★★

Needed a full 3-inch length for a tight jig assembly, and these #4-40s fit perfectly with no slop in the threads. The button head sits flush enough for my fixture, and the whole 2000-count box means I won’t run out mid-project.

Eli ★★★★★

The hex socket drive made these a breeze to install in my jig, and the alloy steel feels durable. Exactly the thread size I needed for precision assemblies.