Mutual Screw & Supply

1/4-28 X 5/8" Socket Cap Screws | Flat Head Hex Socket Drive | Nylon Pellet | Fully Threaded | Alloy Steel Thermal Black Oxide (100 / Pkg.)

1/4-28 X 5/8" Socket Cap Screws | Flat Head Hex Socket Drive | Nylon Pellet | - Main image
$152.96 $203.95 In stock

These 1/4-28 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
  • Head style: Flat Head
  • Drive: Hex Socket Drive
  • Thread style: Fully Threaded
  • Thread size: 1/4-28
  • Length: 5/8"
  • Applications: Machinery, tooling, jigs, and precision assemblies

Specifications

  • Product type: Socket Cap Screws
  • Head style: Flat Head
  • Material: Alloy Steel
  • Finish: Thermal Black Oxide
  • Drive type: Hex Socket Drive
  • Thread style: Fully Threaded
  • Thread size: 1/4-28
  • Length: 5/8"
  • Threads per inch: 28
  • Measurement type: Inch
  • Pack quantity: 100 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)

George ★★★★★

The hex drive on these screws grabbed my Allen key perfectly without any slipping as I tightened them into a steel fixture. The black oxide finish has a nice, consistent look across all 100 pieces.

Jason ★★★★★

Just finished assembling a new jig for my drill press and these flat head screws seated perfectly flush. The thermal black oxide finish feels more durable than standard black oxide I’ve used before.

John ★★★★★

The nylon pellet in these screws is a clever touch—it locks them in place without needing a drop of threadlocker. Set of 100 for the price is solid, and the black oxide finish has held up fine on my tooling jigs so far.