Mutual Screw & Supply

HOLO-KROME 32138 5/16-18 X 1/4" Cup Point Socket Set Screws | Alloy Steel Thermal Black Oxide (100 / Pkg.)

HOLO-KROME 32138 5/16-18 X 1/4" Cup Point Socket Set Screws | Alloy Steel - Main image
$19.13 $31.88 In stock

5/16-18 X 1/4" cup point socket set screws from Holo-Krome, part number 32138, 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: 32138
  • Thread Size: 5/16-18
  • Length: 1/4"
  • 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 (4.8 / 5 · 5 reviews)

William J. ★★★★★

The cup point bites into the shaft nicely and holds firm, even with just a hand-tightened hex key. These are headless, so they sit flush in the tapped hole, which is exactly what I needed for a clean assembly.

Emily ★★★★★

Finally, a set screw where the hex drive actually engages without wobbling. I used a dozen to secure a shaft collar on a prototype jig, and the black oxide finish held up perfectly against the shop oil. These are exactly the quality I’ve been hunting for.

Henry C. ★★★★★

The cup point on these set screws really bites into the shaft without slipping, even with just a few turns. Made quick work of securing a stubborn pulley while resharpening a lawnmower blade.