Mutual Screw & Supply

1/2-20 X 3-1/4" Socket Cap Screws | Button Head Hex Socket Drive | Alloy Steel Thermal Black Oxide (25 / Pkg.)

1/2-20 X 3-1/4" Socket Cap Screws | Button Head Hex Socket Drive | Alloy Steel - Main image
$40.9 $65.97 In stock

These 1/2-20 x 3-1/4" 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 size: 1/2-20
  • Length: 3-1/4"
  • 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 size: 1/2-20
  • Length: 3-1/4"
  • Threads per inch: 20
  • Measurement type: Inch
  • Pack quantity: 25 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)

Alexander P. ★★★★★

The hex socket drive grabbed my 3/8" ratchet perfectly without any stripping—these bolts feel solid. Used them to reinforce a heavy-duty jig frame, and the black oxide coating held up well against minor scuffs during assembly. Exactly what I needed for precise tooling work.

Lily X. ★★★★★

The thermal black oxide finish looks sharp and held up perfectly when I torqued them into my tooling fixture. Hex socket drive seated cleanly with no stripping, and all 25 came with threads that ran smooth right out of the package.

Daniel W. ★★★★★

I needed some quality fasteners for a jig I’m building, and the hex socket drive on these made installation with an Allen wrench really easy. The button head sits flush and looks clean, and the black oxide coating seems durable enough for shop use.