Mutual Screw & Supply

7/8-9 X 3-1/2" Socket Cap Screws | Hex Socket Drive | Nylon Patch | Partially Threaded | Alloy Steel Thermal Black Oxide (10 / Pkg.)

7/8-9 X 3-1/2" Socket Cap Screws | Hex Socket Drive | Nylon Patch | Partially - Main image
$105.18 $150.26 In stock

These 7/8-9 x 3-1/2" 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 style: Partially Threaded
  • Thread size: 7/8-9
  • Length: 3-1/2"
  • 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 style: Partially Threaded
  • Thread size: 7/8-9
  • Length: 3-1/2"
  • 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 (5.0 / 5 · 5 reviews)

Madison ★★★★★

The nylon patch on these screws held fast during a recent tooling adjustment, which saved me from having to use threadlocker. The black oxide finish looks clean and professional on my machine fixture. They threaded smoothly into tapped holes without any binding.

Hazel ★★★★★

I’ve used these on a jig that sees constant clamping pressure, and the thermal black oxide coating has held up without any rust or chipping so far. The partial threads give just the right grip depth for my fixture plate, and the hex socket drive made tightening them in tight spots a breeze. This is

Leo T. ★★★★★

The nylon patch on these is a nice touch—they held snugly in my jig without any need for threadlocker. The black oxide finish looks clean and the partially threaded length worked perfectly for my tooling setup.