Mutual Screw & Supply

5/8-11 X 3-1/2" Socket Cap Screws | Hex Socket Drive | USA Made | Alloy Steel Thermal Black Oxide (140 / Pkg.)

5/8-11 X 3-1/2" Socket Cap Screws | Hex Socket Drive | USA Made | Alloy Steel - Main image
$513.76 $713.56 In stock

These 5/8-11 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 size: 5/8-11
  • 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 size: 5/8-11
  • Length: 3-1/2"
  • Threads per inch: 11
  • Measurement type: Inch
  • Pack quantity: 140 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 (5.0 / 5 · 5 reviews)

Penelope M. ★★★★★

Roughly 40 of these went into a precision assembly fixture I’m building, and every single socket drove smoothly without any cam-out. The black oxide finish feels substantial and hasn’t chipped during torquing, which is exactly what I hoped for.

Samuel Z. ★★★★★

I needed heavy-duty bolts for a jig I was building, and these 5/8-11 screws threaded perfectly into my existing fixtures without any binding. The hex socket drive takes an Allen key well, and the 140 count will last me through several projects.

Sophia ★★★★★

The black oxide finish on these is what sold me—they slide into the hex socket smooth and the machining on the threads is clean. Used them to beef up a press fixture and they’re holding torque perfectly. Pack of 140 is solid value for this grade of bolt.