Mutual Screw & Supply

1/2-20 X 3" Socket Cap Screws | Hex Socket Drive | USA Made | Alloy Steel Thermal Black Oxide (250 / Pkg.)

1/2-20 X 3" Socket Cap Screws | Hex Socket Drive | USA Made | Alloy Steel - Main image
$505.84 $778.22 In stock

These 1/2-20 x 3" 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: 1/2-20
  • Length: 3"
  • 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: 1/2-20
  • Length: 3"
  • Threads per inch: 20
  • Measurement type: Inch
  • Pack quantity: 250 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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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)

Richard C. ★★★★★

I needed these for a heavy-duty tooling fixture, and the black oxide finish is holding up much better than the plain steel ones I used before. The hex socket drive engaged cleanly on every single screw in the pack — no stripped heads or burrs.

Claire J. ★★★★★

For a jig that takes a beating daily, these alloy steel screws have held up perfectly—the black oxide finish still looks clean after months of shop use. Threads cut smooth right out of the box, and the 250 count means I won't need to reorder for a long time.

Andrew ★★★★★

The hex socket drive made tightening these down in tight spots much easier than using a standard wrench. They feel incredibly solid and the black oxide finish looks clean on my new jig.