Mutual Screw & Supply

1-3/8-6 X 4-1/4" Socket Cap Screws | Hex Socket Drive | Partially Threaded | Alloy Steel Thermal Black Oxide

1-3/8-6 X 4-1/4" Socket Cap Screws | Hex Socket Drive | Partially Threaded | - Main image
$34.88 $51.3 In stock

These 13/8-6 x 4-1/4" 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
  • Drive: Hex Socket Drive
  • Thread style: Partially Threaded
  • Thread size: 13/8-6
  • Length: 4-1/4"
  • 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: 13/8-6
  • Length: 4-1/4"
  • 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 (4.4 / 5 · 5 reviews)

Scarlett ★★★★★

Used a full box of these mounting jig brackets on a steel frame and not one stripped or snapped during torquing. The black oxide finish held up nicely against shop grime, and the partially threaded length gave just the right grip for thick flanges. Solid choice if you need screws that behave under r

Ryan ★★★★★

The partially threaded design made it easy to get a firm grip during installation, and the black oxide finish adds a nice layer of corrosion resistance. These screws feel solid and are working perfectly in my jig setup.

Henry Z. ★★★★★

I needed a longer cap screw for a fixture I was building, and the partially threaded section on these made alignment much easier than dealing with a fully threaded bolt. The black oxide finish also gives them a clean, professional look on the tooling.