Mutual Screw & Supply

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

5/16-18 X 3/4" Socket Cap Screws | Hex Socket Drive | Nylon Patch | Fully - Main image
$33.09 $47.96 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
  • 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
  • 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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Standard Shipping: Handling (business days) 0–1; Transit (business days) 7–15.

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 (4.8 / 5 · 5 reviews)

Sofia ★★★★★

Third batch of these for my jigs and they’ve been flawless—the hex socket drive fits snugly every time, no stripping. The thermal black oxide finish looks sharp and hasn’t shown a speck of rust on the shop floor.

Aurora ★★★★★

Grabbed a box for a jig I'm building and the thermal black oxide finish looks properly even across all 100 pieces. The hex socket drive seated cleanly on my Allen key without any wobble, and the nylon patch held tight during a quick vibration test.

James S. ★★★★★

The nylon patch locking feature is a nice touch—these screws held firm on a jig I built without any need for threadlocker. The hex socket drive made installation quick even in a tight spot.