Mutual Screw & Supply

HOLO-KROME 78078 5/16-18 X 7/8" Socket Cap Screws | Hex Socket Drive | 18/8 Stainless Steel (100 / Pkg.)

HOLO-KROME 78078 5/16-18 X 7/8" Socket Cap Screws | Hex Socket Drive | 18/8 - Main image
$84.02 $127.31 In stock

These 5/16-18 x 7/8" socket cap screws are manufactured from 18/8 Stainless Steel, featuring a socket drive. They are well suited to machinery, tooling, jigs, and precision assemblies.

  • Material and finish: 18/8 Stainless Steel
  • Drive: Socket Drive
  • Thread size: 5/16-18
  • Length: 7/8"
  • Applications: Machinery, tooling, jigs, and precision assemblies

Specifications

  • Product type: Socket Cap Screws
  • Material: 18/8 Stainless Steel
  • Finish: Plain
  • Grade: 18/8
  • Drive type: Socket Drive
  • Thread size: 5/16-18
  • Length: 7/8"
  • Threads per inch: 18
  • Measurement type: Inch
  • Pack quantity: 100 per package
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Express Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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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)

Sebastian ★★★★★

The hex drive on these cap screws made installation on my jig table much smoother than I expected. The 18/8 stainless finish has held up well against minor shop moisture so far.

Owen ★★★★★

Really glad I picked these up for a few jig builds I’m working on—the 18/8 stainless feels solid and the hex socket drive made installation a breeze.

Benjamin ★★★★★

The hex drive on these cap screws fits my hex keys perfectly with no wobble, and the 18/8 stainless steel feels solid. I used them to secure some jig fixtures, and they threaded in smoothly without binding. Exactly what I needed for precision work.