Mutual Screw & Supply

HOLO-KROME 64052 5/16-18 X 3/8" Socket Cap Screws | Button Head Hex Socket Drive | Alloy Steel Thermal Black Oxide (100 / Pkg.)

HOLO-KROME 64052 5/16-18 X 3/8" Socket Cap Screws | Button Head Hex Socket - Main image
$21.94 $36.57 In stock

These 5/16-18 x 3/8" 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: 3/8"
  • 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: 3/8"
  • 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 (4.6 / 5 · 5 reviews)

Henry B. ★★★★★

The black oxide finish on these screws looks sharp and should resist rust well in my shop jigs. The hex socket drives seated perfectly without any stripping during install. Exactly what I needed for precise fixture assembly.

John ★★★★★

Used these to replace some worn fasteners on a milling fixture, and the black oxide finish seems much more durable than plain steel. The hex drive seated perfectly without any stripping. Exactly what I needed for precision tooling work.

Adam A. ★★★★★

Installed these in a jig that sees constant vibration and the black oxide finish hasn’t marred at all. The button head sits flush enough for tight spots and the hex drive grabs securely.