Mutual Screw & Supply

5/8-11 X 3-1/4" Socket Cap Screws | Hex Socket Drive | Nylon Pellet | Partially Threaded | Alloy Steel Thermal Black Oxide (25 / Pkg.)

5/8-11 X 3-1/4" Socket Cap Screws | Hex Socket Drive | Nylon Pellet | Partially - Main image
$74.12 $104.4 In stock

These 5/8-11 x 3-1/4" 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: 5/8-11
  • Length: 3-1/4"
  • 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: 5/8-11
  • Length: 3-1/4"
  • Threads per inch: 11
  • Measurement type: Inch
  • Pack quantity: 25 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)

Ruby C. ★★★★★

Exactly what I needed for a tight spot on a tooling fixture—the hex drive seated cleanly and the nylon pellet held fast without any loosening. The black oxide finish looks durable and should resist rust well in my shop.

Joshua ★★★★★

Used a few of these to rebuild a jig at work, and the nylon pellet in the threads holds adjustment way better than set screws I’ve tried before. The hex socket drive on the 3-1/4" length made installation easy even in tight spots. Solid purchase for tooling.

Nicholas ★★★★★

The black oxide finish on these 5/8-11 cap screws gave them a solid, non-slip grip right out of the pack, and the partially threaded length was spot-on for the jig I'm building. They seated cleanly with a hex key, no wobble, and the nylon pellet adds a reassuring bite that kept everything locked dow