Mutual Screw & Supply

5/16-18 X 7/8" Socket Cap Screws | Flat Head Hex Socket Drive | Alloy Steel Zinc Plated (200 / Pkg.)

5/16-18 X 7/8" Socket Cap Screws | Flat Head Hex Socket Drive | Alloy Steel - Main image
$31.2 $48 In stock

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

  • Material and finish: Alloy Steel Zinc Plated
  • Head style: Flat Head
  • Drive: Hex Socket Drive
  • Thread size: 5/16-18
  • Length: 7/8"
  • Applications: Machinery, tooling, jigs, and precision assemblies

Specifications

  • Product type: Socket Cap Screws
  • Head style: Flat Head
  • Material: Alloy Steel
  • Finish: Zinc Plated
  • Grade: CR+3
  • Drive type: Hex Socket Drive
  • Thread size: 5/16-18
  • Length: 7/8"
  • Threads per inch: 18
  • Measurement type: Inch
  • Pack quantity: 200 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)

Avery T. ★★★★★

I needed these for a jig I was building and the flat head design sat perfectly flush. The zinc coating looks even and the threads were clean on every single one across the whole pack.

Christopher ★★★★★

Perfect fit for my milling machine's hold-down clamps—the hex socket drive made installation quick with a standard Allen key. The zinc plating looks consistent across all 200 pieces, no rust spots.

Sebastian E. ★★★★★

Bought these for a jig I was building and the hex socket drive makes them incredibly easy to get torqued down in tight spots, even with a ball-end Allen key. The zinc plating has a nice, even finish that should hold up fine in my shop. For a 200-pack at this price, they're a solid deal if you go thr