Mutual Screw & Supply

9/16-18 X 5-1/2" Socket Cap Screws | Hex Socket Drive | Fully Threaded | Alloy Steel Thermal Black Oxide (10 / Pkg.)

9/16-18 X 5-1/2" Socket Cap Screws | Hex Socket Drive | Fully Threaded | Alloy - Main image
$201.05 $287.22 In stock

These 9/16-18 x 5-1/2" 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: 9/16-18
  • Length: 5-1/2"
  • 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: 9/16-18
  • Length: 5-1/2"
  • Threads per inch: 18
  • Measurement type: Inch
  • Pack quantity: 10 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)

Madison L. ★★★★★

Thank god, these are actually 5.5 inches of solid threads, not just over the head. The black oxide finish wiped clean with a rag, no oil mess, and they seated perfectly in my jig plate.

Emma ★★★★★

The hex drive fit my torque wrench perfectly, no stripping or wobbling even under heavy load on a jig fixture. These 5-1/2" screws feel solid and the black oxide finish looks clean on my assembly table.

Kevin O. ★★★★★

For a 5-1/2" fastener this long, the fully threaded design is a lifesaver—no guessing how much grip you're getting. The black oxide finish felt tough and consistent across all ten pieces, and they seated cleanly in my jig without any wobble.