Mutual Screw & Supply

5/16-18 X 7/8" Socket Cap Screws | Low Head Hex Socket Drive | Fully Threaded | Alloy Steel Thermal Black Oxide (100 / Pkg.)

5/16-18 X 7/8" Socket Cap Screws | Low Head Hex Socket Drive | Fully Threaded | - Main image
$33.89 $47.07 In stock

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

  • Material and finish: Alloy Steel Thermal Black Oxide
  • Drive: Hex Socket Drive
  • Thread style: Fully Threaded
  • Thread size: 5/16-18
  • Length: 7/8"
  • Applications: Machinery, tooling, jigs, and precision assemblies

Specifications

  • Product type: Socket Cap Screws
  • Material: Alloy Steel
  • Finish: Thermal Black Oxide
  • Drive type: Hex Socket Drive
  • Thread style: Fully Threaded
  • Thread size: 5/16-18
  • Length: 7/8"
  • 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 (4.8 / 5 · 5 reviews)

Joseph W. ★★★★★

The low head profile on these is perfect for tight clearance spots on my jig fixture, and the black oxide finish hasn’t shown a speck of rust after a month in a damp shop. Fully threaded all the way down too, which made stacking washers a breeze.

Richard E. ★★★★★

The hex socket drive grabbed my Allen key securely without any stripping even on the first few turns, and the black oxide finish looks clean against my jig frame. I’ve used a dozen so far on a tooling setup and the threads cut smoothly into the tapped holes.

Natalie Z. ★★★★★

These screws fit perfectly in a tight clearance area on my milling jig where a standard cap screw would have stuck out. The black oxide finish seems really durable and hasn't chipped during installation.