Mutual Screw & Supply

HOLO-KROME 43020 1/4-28 X 5/16" Knurled Cup Point Socket Set Screws | Alloy Steel Thermal Black Oxide (100 / Pkg.)

HOLO-KROME 43020 1/4-28 X 5/16" Knurled Cup Point Socket Set Screws | Alloy - Main image
$20.14 $28.37 In stock

1/4-28 X 5/16" knurled cup point socket set screws from Holo-Krome, part number 43020, headless and hex socket driven for locating and clamping components on shafts and in tapped holes.

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

Specifications

  • Part Number: 43020
  • Thread Size: 1/4-28
  • Length: 5/16"
  • Point Type: Knurled 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)

Sophia I. ★★★★★

Finally found a set screw that actually bites into the shaft without stripping—the knurled cup point grips way better than the smooth ones I've used before. These went into a tapped hole cleanly on my first try, and the hex socket fit my driver perfectly.

Jacob ★★★★★

The black oxide finish looks clean and professional, and these screws hold firmly in tapped holes without slipping during tightening.

Madison ★★★★★

These knurled cup points really grab tight without stripping the socket, and the 5/16" length is perfect for my clamping setups. I’ve used them on a few shaft projects now, and they seat cleanly every time.