Mutual Screw & Supply

1-3/8-6 X 4-1/2" Socket Cap Screws | Hex Socket Drive | Partially Threaded | Alloy Steel Thermal Black Oxide

1-3/8-6 X 4-1/2" Socket Cap Screws | Hex Socket Drive | Partially Threaded | - Main image
$43.57 $59.69 In stock

These 13/8-6 x 4-1/2" 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: Partially Threaded
  • Thread size: 13/8-6
  • Length: 4-1/2"
  • 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: Partially Threaded
  • Thread size: 13/8-6
  • Length: 4-1/2"
  • Threads per inch: 6
  • Measurement type: Inch
  • Pack quantity: 1 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 (4.8 / 5 · 5 reviews)

Lily X. ★★★★★

The hex socket drive made installation a breeze with my standard Allen wrench set, and the 4-1/2" length gives just enough grip for the heavy jig I'm building. The partially threaded design holds firm under pressure without stripping.

Ella I. ★★★★★

The black oxide finish on these screws handled my heavy-duty machining setup without any signs of wear after multiple adjustments. The 4-1/2" length was exactly what my precision jig needed, and the hex drive made installation straightforward even in a tight space.

Edward ★★★★★

The thermal black oxide coating on these screws seems really durable — no chips or scratches after tightening into my fixture. The hex drive bit seated firmly without any wobble.