Mutual Screw & Supply

HOLO-KROME 64040 1/4-20 X 3/8" Socket Cap Screws | Button Head Hex Socket Drive | Alloy Steel Thermal Black Oxide (100 / Pkg.)

HOLO-KROME 64040 1/4-20 X 3/8" Socket Cap Screws | Button Head Hex Socket Drive - Main image
$23.84 $34.05 In stock

These 1/4-20 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: 1/4-20
  • 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: 1/4-20
  • Length: 3/8"
  • Threads per inch: 20
  • 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 (4.4 / 5 · 5 reviews)

Mia X. ★★★★★

Had to replace a stripped screw on a milling fixture, and these button heads fit perfectly with no wobble. The black oxide finish feels sturdy and should hold up well in oily conditions.

Emily ★★★★★

Installed these on a jig for some precision drilling work and they seated perfectly flush. The hex socket drive made tightening them down in tight spaces a breeze, really solid hold.

Emily ★★★★★

These little button heads fit perfectly into a tight spot on a small jig I'm building, and the black oxide finish cleaned up easily with just a wipe. The hex drive seated firmly without any stripping, which was a relief.