Mutual Screw & Supply

#4-40 X 1/2" Socket Cap Screws | Low Head Hex Socket Drive | Alloy Steel Thermal Black Oxide (100 / Pkg.)

#4-40 X 1/2" Socket Cap Screws | Low Head Hex Socket Drive | Alloy Steel - Main image
$46.12 $69.88 In stock

These #4-40 x 1/2" socket cap screws are manufactured from Alloy Steel Thermal Black Oxide, featuring a hex socket drive. They are well suited to machinery, tooling, jigs, and precision assemblies.

  • Material and finish: Alloy Steel Thermal Black Oxide
  • Drive: Hex Socket Drive
  • Thread size: #4-40
  • Length: 1/2"
  • Applications: Machinery, tooling, jigs, and precision assemblies

Specifications

  • Product type: Socket Cap Screws
  • Material: Alloy Steel
  • Finish: Thermal Black Oxide
  • Drive type: Hex Socket Drive
  • Thread size: #4-40
  • Length: 1/2"
  • Threads per inch: 40
  • Measurement type: Inch
  • Pack quantity: 100 per package
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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)

John ★★★★★

The black oxide coating on these screws gives them a nice, even finish that makes them easy to handle with tweezers. They fit perfectly into the tapped holes on my small milling jig without any wobble.

Matthew W. ★★★★★

Picked up a pack for securing a small jig on my mill, and the 1/2" length is just right for thin plates. The black oxide finish makes them look clean and should resist rust well enough for shop use.

Lily D. ★★★★★

The low head profile on these #4-40 screws is perfect for tight clearance spots in my fixture plate. The black oxide finish seems durable and the hex drive engages without any stripping. I'll definitely order another pack for future builds.