Mutual Screw & Supply

1/4-20 X 5/8" Socket Cap Screws | Hex Socket Drive | Nylon Patch | Fully Threaded | Alloy Steel Thermal Black Oxide (200 / Pkg.)

1/4-20 X 5/8" Socket Cap Screws | Hex Socket Drive | Nylon Patch | Fully - Main image
$32.92 $54.86 In stock

These 1/4-20 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: 1/4-20
  • 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: 1/4-20
  • Length: 5/8"
  • Threads per inch: 20
  • Measurement type: Inch
  • Pack quantity: 200 per package
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Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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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)

William U. ★★★★★

The nylon patch locking feature is a nice touch—these screws stay put even with some vibration on my jig. I ordered two packs for a fixture build and every single one threaded cleanly into tapped holes. The black oxide finish gives them a clean, professional look that matches my other hardware.

Jacob ★★★★★

These are holding up perfectly on my drill press jig, and the black oxide finish hasn't scratched off during assembly like cheaper screws I've used. The hex socket drive made it easy to torque them down in tight spaces.

Robert ★★★★★

The nylon patch is a great touch—these screws hold their torque even after a few rounds of adjustments on my fixture. The black oxide finish looks clean and gives them a solid, durable feel that I wasn’t expecting at this price.