Mutual Screw & Supply

5/16-18 X 1-1/8" Socket Cap Screws | Hex Socket Drive | USA Made | Fully Threaded | 18/8 Stainless Steel (30 / Pkg.)

5/16-18 X 1-1/8" Socket Cap Screws | Hex Socket Drive | USA Made | Fully - Main image
$33.54 $52.41 In stock

These 5/16-18 x 1-1/8" socket cap screws are manufactured from 18/8 Stainless Steel, featuring a hex socket drive. They are well suited to machinery, tooling, jigs, and precision assemblies.

  • Material and finish: 18/8 Stainless Steel
  • Drive: Hex Socket Drive
  • Thread style: Fully Threaded
  • Thread size: 5/16-18
  • Length: 1-1/8"
  • 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: Hex Socket Drive
  • Thread style: Fully Threaded
  • Thread size: 5/16-18
  • Length: 1-1/8"
  • Threads per inch: 18
  • Measurement type: Inch
  • Pack quantity: 30 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 (4.6 / 5 · 5 reviews)

Matthew ★★★★★

Needed a few for a jig I was building, and the stainless finish held up perfectly after drilling the pilot holes. They seated flush without any binding.

Emma ★★★★★

Been swapping out old zinc bolts on my tooling jigs and these stainless ones are a proper upgrade. Threads cut clean with no binding, and the fully threaded length means I didn't need washers in most spots. Set of thirty is enough to finish the whole project with a few spares.

Jason X. ★★★★★

The hex socket drive on these 5/16-18 cap screws grabbed perfectly with my allen key, and the 18/8 stainless steel feels solid for a jig I'm building. They're fully threaded, which made installation clean and straightforward.