Mutual Screw & Supply

#4-40 X 5/8" Socket Cap Screws | Hex Socket Drive | Nylon Pellet | Fully Threaded | Alloy Steel Thermal Black Oxide (200 / Pkg.)

#4-40 X 5/8" Socket Cap Screws | Hex Socket Drive | Nylon Pellet | Fully - Main image
$32.03 $43.28 In stock

These #4-40 x 5/8" 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: #4-40
  • Length: 5/8"
  • 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: #4-40
  • Length: 5/8"
  • Threads per inch: 40
  • Measurement type: Inch
  • Pack quantity: 200 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)

Samuel G. ★★★★★

I was pleasantly surprised by how precisely these screws fit into my small jig setup; the black oxide finish gives them a nice, durable look that resists wear.

Emily ★★★★★

The nylon pellet really locks these down without damaging the surface—perfect for my jig setup. Threads cut cleanly into 6061 aluminum with no galling.

Natalie O. ★★★★★

For a hundred bucks you get 200 of these little guys and the black oxide finish looks sharp on my jig. The nylon pellet keeps them snug in threaded holes without needing threadlocker. Threads are clean and consistent all the way down.