Mutual Screw & Supply

HOLO-KROME 72182 3/8-16 X 4-1/2" Socket Cap Screws | Hex Socket Drive | Alloy Steel Thermal Black Oxide (50 / Pkg.)

HOLO-KROME 72182 3/8-16 X 4-1/2" Socket Cap Screws | Hex Socket Drive | Alloy - Main image
$76.17 $101.56 In stock

These 3/8-16 x 4-1/2" 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: 3/8-16
  • 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: Socket Drive
  • Thread size: 3/8-16
  • Length: 4-1/2"
  • Threads per inch: 16
  • Measurement type: Inch
  • Pack quantity: 50 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)

Eva ★★★★★

The black oxide finish on these screws is really uniform and seems durable—installed a few in a jig fixture with no issue. Threads were clean and started easily by hand before tightening with the hex key.

Stella ★★★★★

Needed a long 4-1/2" cap screw for a custom tooling fixture, and the black oxide finish on these gives them a nice, durable look. The threads engaged smoothly without any binding, which saved me a lot of time. Perfect for heavy-duty use so far.

Olivia ★★★★★

Been using these in my jig builds and the black oxide finish has held up through repeated clamping without a speck of rust. Threads seated cleanly into the tapped holes with no binding, and the alloy steel drove down tight without a hint of flex.