Mutual Screw & Supply

5/16-18 X 2-1/2" Socket Cap Screws | Hex Socket Drive | Nylon Pellet | Partially Threaded | Alloy Steel Thermal Black Oxide (100 / Pkg.)

5/16-18 X 2-1/2" Socket Cap Screws | Hex Socket Drive | Nylon Pellet | - Main image
$233.96 $320.49 In stock

These 5/16-18 x 2-1/2" 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: Partially Threaded
  • Thread size: 5/16-18
  • Length: 2-1/2"
  • 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: Partially Threaded
  • Thread size: 5/16-18
  • Length: 2-1/2"
  • Threads per inch: 18
  • Measurement type: Inch
  • Pack quantity: 100 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 (5.0 / 5 · 5 reviews)

Ellie ★★★★★

The black oxide finish on these screws looks great and resists rust better than the plain steel ones I've used before. They threaded smoothly into my jig fixture without any binding, and the nylon pellet provides that extra locking security. Perfect for tooling applications where vibration is a conc

Samuel ★★★★★

I needed some extra holding power for a jig I was building, and the hex socket drive on these screws made installation a breeze with just an Allen key. The black oxide finish has a nice, consistent look that doesn't feel cheap, and they threaded cleanly into pre-tapped holes without binding.

Eli J. ★★★★★

The partially threaded design made these perfect for my jig setup, gripping securely while leaving the head flush. They drove in cleanly with a hex key, and the black oxide finish hasn't shown any wear after several adjustments.