Mutual Screw & Supply

1/4-20 X 3-1/4" Socket Cap Screws | Flat Head Hex Socket Drive | Alloy Steel Thermal Black Oxide (100 / Pkg.)

1/4-20 X 3-1/4" Socket Cap Screws | Flat Head Hex Socket Drive | Alloy Steel - Main image
$41.68 $58.7 In stock

These 1/4-20 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: 1/4-20
  • 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: 1/4-20
  • Length: 3-1/4"
  • Threads per inch: 20
  • Measurement type: Inch
  • Pack quantity: 100 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)

Sebastian ★★★★★

The black oxide finish on these screws is holding up great under my high-torque assembly jig, no slipping at all with the hex socket.

Leo Z. ★★★★★

I needed a longer screw for a jig I was building, and these 1/4-20s fit perfectly with no stripping. The black oxide finish gives them a solid, non-glare look that holds up well.

Riley D. ★★★★★

The hex socket drive holds up way better than a Phillips under torque—no stripping after a dozen installs on my jig table. The thermal black oxide finish gave them a nice, uniform look right out of the bag. Ten out of ten for the price, especially with a hundred in the pack.