Mutual Screw & Supply

7/8-9 X 4" Socket Cap Screws | Hex Socket Drive | Nylon Pellet | Partially Threaded | Alloy Steel Thermal Black Oxide (10 / Pkg.)

7/8-9 X 4" Socket Cap Screws | Hex Socket Drive | Nylon Pellet | Partially - Main image
$156.77 $227.2 In stock

These 7/8-9 x 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
  • Drive: Hex Socket Drive
  • Thread style: Partially Threaded
  • Thread size: 7/8-9
  • Length: 4"
  • 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: 4"
  • Threads per inch: 9
  • Measurement type: Inch
  • Pack quantity: 10 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 (4.8 / 5 · 5 reviews)

Joseph M. ★★★★★

The thermal black oxide finish on these looks sharp and held up fine during assembly, no chips or smears. The hex socket drive seated perfectly with my Allen key, and the partial threads gripped the work piece exactly where I needed them. For a ten-pack of 4-inch alloy steel caps, the price is a ste

George ★★★★★

Finally got around to swapping out the old hardware on my drill press jig—these screws seated perfectly with a hex key and the black oxide finish looks great. The nylon pellet really helped lock them in place without any thread locker.

Mia R. ★★★★★

Used them to secure a fixture plate on my milling setup, and the nylon pellet really holds tight under vibration. The thermal black oxide also gives them a clean, uniform finish that resists rust better than I expected.