Mutual Screw & Supply

HOLO-KROME 72128 5/16-18 X 1" Socket Cap Screws | Hex Socket Drive | Excess Stock | Alloy Steel Thermal Black Oxide (100 / Pkg.)

HOLO-KROME 72128 5/16-18 X 1" Socket Cap Screws | Hex Socket Drive | Excess - Main image
$12.08 $19.8 In stock

These 5/16-18 x 1" 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 size: 5/16-18
  • Length: 1"
  • 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 size: 5/16-18
  • Length: 1"
  • Threads per inch: 18
  • Measurement type: Inch
  • Pack quantity: 100 per package

Please note: This item is excess stock and is sold non-cancelable, non-refundable, and non-returnable. Please call us with any questions about this item before ordering.

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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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Returning an item

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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)

Daniel ★★★★★

The hex socket drive grips my Allen key perfectly, no stripping or wobble even when I torqued them down on a jig build. Threads ran smooth into tapped holes, and the thermal black oxide gives them a clean, uniform look for precision assemblies.

Kevin S. ★★★★★

Black oxide finish is holding up well even after a few assembly-disassembly cycles on my jig, and the hex socket drive makes them easy to install in tight spaces. Exactly what I needed for precise tooling work.

Abigail N. ★★★★★

I needed some 5/16-18 x 1" screws for a jig I was building, and these hex socket caps fit perfectly. The thermal black oxide coating feels tough and should resist rust in my shop.