Mutual Screw & Supply

HOLO-KROME 64056 5/16-18 X 5/8" Socket Cap Screws | Button Head Hex Socket Drive | Alloy Steel Thermal Black Oxide (100 / Pkg.)

HOLO-KROME 64056 5/16-18 X 5/8" Socket Cap Screws | Button Head Hex Socket - Main image
$27.36 $38 In stock

These 5/16-18 x 5/8" socket cap screws are manufactured from Alloy Steel Thermal Black Oxide, featuring a socket drive. They are well suited to machinery, tooling, jigs, and precision assemblies.

  • Material and finish: Alloy Steel Thermal Black Oxide
  • Head style: Button Head
  • Drive: Socket Drive
  • Thread size: 5/16-18
  • Length: 5/8"
  • Applications: Machinery, tooling, jigs, and precision assemblies

Specifications

  • Product type: Socket Cap Screws
  • Head style: Button Head
  • Material: Alloy Steel
  • Finish: Thermal Black Oxide
  • Drive type: Socket Drive
  • Thread size: 5/16-18
  • Length: 5/8"
  • Threads per inch: 18
  • 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)

Lily ★★★★★

The black oxide finish on these button heads gives them a clean, uniform look that makes my jigs and fixtures look professionally built. They seat perfectly in the hex socket with no stripped corners, and the alloy steel feels solid under torque. Exactly what I needed for a tight assembly.

Carter ★★★★★

I’ve been using these socket cap screws for some precision jig builds, and they fit perfectly into tight spaces thanks to the button head design. The hex socket drive holds strong without any stripping, even after multiple adjustments.

David ★★★★★

The black oxide finish on these screws gives them a clean, uniform look that blends right into my jig build. They threaded smoothly and held tight without any stripping, even at the torque I put on them.