Mutual Screw & Supply

5/16-18 X 3/4" Socket Cap Screws | Flat Head Hex Socket Drive | Nylon Pellet | Fully Threaded | Alloy Steel Thermal Black Oxide (100 / Pkg.)

5/16-18 X 3/4" Socket Cap Screws | Flat Head Hex Socket Drive | Nylon Pellet | - Main image
$288.15 $457.38 In stock

These 5/16-18 x 3/4" 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
  • Head style: Flat Head
  • Drive: Hex Socket Drive
  • Thread style: Fully Threaded
  • Thread size: 5/16-18
  • Length: 3/4"
  • 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: Hex Socket Drive
  • Thread style: Fully Threaded
  • Thread size: 5/16-18
  • Length: 3/4"
  • Threads per inch: 18
  • 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)

Eli ★★★★★

Used these for a jig I was building, and the hex socket drive made installation much easier with a standard Allen key. The black oxide finish looks clean and hasn't shown any wear after some heavy use.

Joseph P. ★★★★★

The hex socket drive fit my T-handle wrench perfectly, and the nylon pellet held fast after I tightened them into a jig frame. These black oxide screws feel rugged enough for repeated adjustments on my drill press table.

Abigail ★★★★★

Was pleasantly surprised by how cleanly the nylon pellet held these in place after tightening—no loosening even with some vibration. The black oxide coating gave a nice, uniform finish against the steel frame. Exactly what I needed for a jig repair.