Mutual Screw & Supply

HOLO-KROME 77500 3/8-24 X 3-1/2" Socket Cap Screws | Hex Socket Drive | Alloy Steel Thermal Black Oxide (50 / Pkg.)

HOLO-KROME 77500 3/8-24 X 3-1/2" Socket Cap Screws | Hex Socket Drive | Alloy - Main image
$59.85 $88.02 In stock

These 3/8-24 x 3-1/2" 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: 3/8-24
  • Length: 3-1/2"
  • 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: 3/8-24
  • Length: 3-1/2"
  • Threads per inch: 24
  • Measurement type: Inch
  • Pack quantity: 50 per package
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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 (4.6 / 5 · 5 reviews)

Ella J. ★★★★★

Replaced the old bolts on my mill’s clamping kit with these, and the black oxide coating is holding up well against cutting fluid. The hex drive fits perfectly with standard Allen keys, no stripping.

Jacob ★★★★★

The black oxide finish looks superb on my tooling setup, and the alloy steel feels rock-solid when torqued down. Threads ran clean into the fixture without any galling, so these 50 pieces will last me a long while.

Owen ★★★★★

Installing these on a jig assembly, the hex socket drive gripped the bit nicely without stripping. The black oxide finish makes them look clean and professional, and for the price you get a solid 50-pack.