Mutual Screw & Supply

1-3/8-12 X 3" Socket Cap Screws | Hex Socket Drive | Fully Threaded | Alloy Steel Thermal Black Oxide

1-3/8-12 X 3" Socket Cap Screws | Hex Socket Drive | Fully Threaded | Alloy - Main image
$33.52 $51.57 In stock

These 13/8-12 x 3" 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: Fully Threaded
  • Thread size: 13/8-12
  • Length: 3"
  • 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: Fully Threaded
  • Thread size: 13/8-12
  • Length: 3"
  • Threads per inch: 12
  • Measurement type: Inch
  • Pack quantity: 1 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 (4.6 / 5 · 5 reviews)

Sofia T. ★★★★★

The hex socket drive made torquing them into my precision assembly a breeze with no cam-out. The black oxide coating is a nice touch, giving them a clean, professional look against the metal.

Joshua ★★★★★

I needed heavy-duty screws for a jig I’m building, and these 3-inch fully threaded ones with the black oxide finish feel rock solid. The hex socket drive gave me a perfect grip without any stripping.

Carter ★★★★★

The hex socket drive made it easy to tighten these into my milling fixture without stripping, and the black oxide finish resists wear well.