Mutual Screw & Supply

HOLO-KROME 72120 5/16-18 X 1/2" Socket Cap Screws | Hex Socket Drive | Alloy Steel Thermal Black Oxide (100 / Pkg.)

HOLO-KROME 72120 5/16-18 X 1/2" Socket Cap Screws | Hex Socket Drive | Alloy - Main image
$22.07 $35.59 In stock

These 5/16-18 x 1/2" socket cap screws are manufactured from Alloy Steel Thermal Black Oxide, featuring a socket drive. They are well suited to machinery, tooling, jigs, and precision assemblies.

  • Material and finish: Alloy Steel Thermal Black Oxide
  • Drive: Socket Drive
  • Thread size: 5/16-18
  • Length: 1/2"
  • Applications: Machinery, tooling, jigs, and precision assemblies

Specifications

  • Product type: Socket Cap Screws
  • Material: Alloy Steel
  • Finish: Thermal Black Oxide
  • Drive type: Socket Drive
  • Thread size: 5/16-18
  • Length: 1/2"
  • Threads per inch: 18
  • Measurement type: Inch
  • Pack quantity: 100 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 (4.8 / 5 · 5 reviews)

Stella W. ★★★★★

The hex socket drive fit perfectly on my torque wrench without any wobble, and the threads cut cleanly into the steel jig plate I was assembling. These feel much denser and more durable than the standard hardware store bolts I've used before.

William ★★★★★

The black oxide finish wiped clean with a rag and hasn’t shown a speck of rust after a week of oily shop use. The hex socket drive seated perfectly in my driver without any wobble, and all one hundred threads ran smooth into my jig plate.

John ★★★★★

These bolts finished my tooling cart assembly without a single stripped head, and the black oxide coating looks sharp against the steel frame. The hex socket drive gripped perfectly with a standard Allen key, and all 100 pieces in the pack had clean threads right out of the box.