Mutual Screw & Supply

HOLO-KROME 61030 5/16-24 X 1/2" Socket Cap Screws | Flat Head Hex Socket Drive | Alloy Steel Thermal Black Oxide (100 / Pkg.)

HOLO-KROME 61030 5/16-24 X 1/2" Socket Cap Screws | Flat Head Hex Socket Drive - Main image
$31.27 $47.38 In stock

These 5/16-24 x 1/2" 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: Flat Head
  • Drive: Socket Drive
  • Thread size: 5/16-24
  • Length: 1/2"
  • 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: Socket Drive
  • Thread size: 5/16-24
  • Length: 1/2"
  • Threads per inch: 24
  • Measurement type: Inch
  • Pack quantity: 100 per package
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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)

Stella W. ★★★★★

Threads are clean and the black oxide finish looks even across all a hundred pieces. The flat head sits flush in my tooling plates without any wobble. These are going to be my go-to for precision work from now on.

Chloe ★★★★★

Used these for a jig I'm building and the flat head seating is perfect—countersinks flush every time. The thermal black oxide has a nice even coating that hasn't chipped even after some wrenching.

Claire U. ★★★★★

The black oxide finish gave these screws a clean, uniform look right out of the package, and the hex socket drive seated perfectly with my Allen wrench on the first try. Used a dozen on a jig fixture and they threaded in smooth without any binding or galling. Solid batch of 100 for the price.