Mutual Screw & Supply

7/8-9 X 8" Socket Cap Screws | Flat Head Hex Socket Drive | Partially Threaded | Alloy Steel Thermal Black Oxide (10 / Pkg.)

7/8-9 X 8" Socket Cap Screws | Flat Head Hex Socket Drive | Partially Threaded - Main image
$219.53 $365.88 In stock

These 7/8-9 x 8" 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 style: Partially Threaded
  • Thread size: 7/8-9
  • Length: 8"
  • 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 style: Partially Threaded
  • Thread size: 7/8-9
  • Length: 8"
  • Threads per inch: 9
  • Measurement type: Inch
  • Pack quantity: 10 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 (4.8 / 5 · 5 reviews)

Brian ★★★★★

Had to replace some worn fasteners on a production jig, and these threaded in smoothly with no binding. The black oxide finish seems more consistent than other screws I've tried, and the flat head sits flush without wobbling. Definitely worth the price for a ten-pack.

Nicholas ★★★★★

Used these to secure some jig fixtures on my mill table, and the 8-inch length gave me plenty of bite without bottoming out. The black oxide coating seems to be holding up well against shop grime.

Grace ★★★★★

The partially threaded design made alignment in my jig a lot easier than fully threaded bolts, and the black oxide finish has held up well against shop grime so far. Torqued them down with a hex key and they seated flush without any stripping.