Mutual Screw & Supply

1/2-20 X 4" Socket Cap Screws | Button Head Hex Socket Drive | Fully Threaded | Alloy Steel Thermal Black Oxide (25 / Pkg.)

1/2-20 X 4" Socket Cap Screws | Button Head Hex Socket Drive | Fully Threaded | - Main image
$77.27 $122.65 In stock

These 1/2-20 x 4" 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
  • Head style: Button Head
  • Drive: Hex Socket Drive
  • Thread style: Fully Threaded
  • Thread size: 1/2-20
  • Length: 4"
  • Applications: Machinery, tooling, jigs, and precision assemblies

Specifications

  • Product type: Socket Cap Screws
  • Head style: Button Head
  • Material: Alloy Steel
  • Finish: Thermal Black Oxide
  • Drive type: Hex Socket Drive
  • Thread style: Fully Threaded
  • Thread size: 1/2-20
  • Length: 4"
  • Threads per inch: 20
  • Measurement type: Inch
  • Pack quantity: 25 per package
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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)

Charlotte N. ★★★★★

The hex socket drive seated cleanly on my driver with zero wobble, and the black oxide finish held up fine during a full day of tightening jig fixtures. These fully threaded 1/2-20s are exactly the right length for my tooling setup. Packed 25 to a box, so I’ve got spares for the next job.

Isabella J. ★★★★★

The thermal black oxide finish is a nice touch—it’s got that matte, industrial look and feels grippy in the wrench. Threads ran clean through my fixture plates without any binding, and the hex socket seated perfectly every time.

Andrew E. ★★★★★

Installed these in a jig for a drilling fixture I’m building, and the black oxide coating really helps them slide into tapped holes without galling. The hex socket drive feels precise and doesn’t strip under torque.