Mutual Screw & Supply

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

1/2-20 X 3-1/4" Socket Cap Screws | Flat Head Hex Socket Drive | Alloy Steel - Main image
$40.1 $62.65 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: Flat 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: Flat 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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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)

Brian M. ★★★★★

The black oxide finish on these screws handled a greasy shop environment without rust showing after a week of use. They seated flush in my aluminum jig plate, which was exactly what I needed for a tight assembly.

Kevin ★★★★★

Needed some longer bolts for a jig I was building, and these 1/2-20 socket cap screws were the perfect length. The black oxide finish looks great and seems like it'll resist rust well in the shop.

Eli M. ★★★★★

The flat head sits perfectly flush in my tooling fixture—no interference with other parts. I used these for a new assembly jig, and the black oxide finish looks clean and didn't flake during tightening.