Mutual Screw & Supply

1-3/8-6 X 8" Socket Cap Screws | Hex Socket Drive | Partially Threaded | Alloy Steel Thermal Black Oxide

1-3/8-6 X 8" Socket Cap Screws | Hex Socket Drive | Partially Threaded | Alloy - Main image
$75.56 $100.74 In stock

These 13/8-6 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
  • Drive: Hex Socket Drive
  • Thread style: Partially Threaded
  • Thread size: 13/8-6
  • Length: 8"
  • 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: 13/8-6
  • Length: 8"
  • Threads per inch: 6
  • Measurement type: Inch
  • Pack quantity: 1 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 (4.6 / 5 · 5 reviews)

Harper ★★★★★

Threaded these into a die fixture and the black oxide finish held up better than I expected. The hex socket drive made torquing them down precise without stripping.

Ruby ★★★★★

I needed some heavy-duty screws for a jig I was building, and these 8-inch alloy steel cap screws fit the bill perfectly. The hex socket drive made installation much smoother than dealing with a stripped hex head.

Ella B. ★★★★★

The threading was clean enough that they seated perfectly in my jig without any binding, and the black oxide finish looks properly durable. I used them for a fixture plate and the partially threaded length gave exactly the grip I needed.