Mutual Screw & Supply

HOLO-KROME 33078 1/4-28 X 3/8" Cup Point Socket Set Screws | Alloy Steel Thermal Black Oxide (100 / Pkg.)

HOLO-KROME 33078 1/4-28 X 3/8" Cup Point Socket Set Screws | Alloy Steel - Main image
$19.67 $28.51 In stock

1/4-28 X 3/8" cup point socket set screws from Holo-Krome, part number 33078, headless and hex socket driven for locating and clamping components on shafts and in tapped holes.

  • Hex socket drive
  • Cup point
  • Alloy Steel Thermal Black Oxide construction
  • Made in the USA by Holo-Krome

Specifications

  • Part Number: 33078
  • Thread Size: 1/4-28
  • Length: 3/8"
  • Point Type: Cup
  • Drive: Socket
  • Material: Alloy Steel
  • Finish: Thermal Black Oxide
  • Package Quantity: 100
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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 (5.0 / 5 · 5 reviews)

Lucy ★★★★★

The cup point design made alignment much easier than standard set screws when I was securing a shaft collar. The black oxide finish seems durable and hasn't shown any wear after several adjustments. These felt precise and well-machined right out of the package.

Timothy ★★★★★

Installed these to secure a pulley on a motor shaft, and the hex socket fit my Allen wrench perfectly without any stripping. The cup point bit in firmly enough that the pulley hasn't budged under load.

John C. ★★★★★

The black oxide finish on these set screws didn't chip or flake at all when I torqued them down, which is more than I can say for cheaper packs I've tried. Cup point bit in nicely on the shaft and they're holding firm after a few weeks of vibration. Exactly the hardware I needed for the price.