Mutual Screw & Supply

1-3/8-12 X 3-1/2" Socket Cap Screws | Hex Socket Drive | Fully Threaded | Alloy Steel Thermal Black Oxide

1-3/8-12 X 3-1/2" Socket Cap Screws | Hex Socket Drive | Fully Threaded | Alloy - Main image
$36.12 $58.25 In stock

These 13/8-12 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: Fully Threaded
  • Thread size: 13/8-12
  • 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: Fully Threaded
  • Thread size: 13/8-12
  • Length: 3-1/2"
  • 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)

Abigail R. ★★★★★

The black oxide coating on these screws gave them a nice, uniform look for my tool room project, and the hex socket drive made installation much easier than dealing with a stripped hex head.

Jason ★★★★★

The black oxide finish on these screws cuts down on glare in my shop lighting, and the hex drive seated perfectly with my Allen key. They threaded cleanly into the steel plate without binding.

Robert U. ★★★★★

These fit perfectly into my jig fixture where I needed that exact 3-1/2" length, and the black oxide coating feels nice and durable.