Mutual Screw & Supply

1/4-28 X 3/8" Knurled Cup Point Socket Set Screws | Alloy Steel Zinc Plated (250 / Pkg.)

1/4-28 X 3/8" Knurled Cup Point Socket Set Screws | Alloy Steel Zinc Plated - Main image
$44.04 $73.4 In stock

1/4-28 x 3/8" knurled cup point socket set screws in Alloy Steel Zinc Plated, with a hex socket drive for high-torque adjustment in tight spaces.

  • Hex socket drive
  • Knurled Cup Point tip
  • Alloy Steel Zinc Plated construction

Specifications

  • Thread Size: 1/4-28
  • Length: 3/8"
  • Point: Knurled Cup Point
  • Material: Alloy Steel Zinc Plated
  • Package Quantity: 250
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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 (5.0 / 5 · 5 reviews)

Richard ★★★★★

The knurled cup point really grips the shaft tightly without marring the surface, exactly what I needed for a stubborn pulley application. These set screws seated perfectly with a standard hex key, and the zinc plating seems durable.

David E. ★★★★★

I was worried the hex socket might strip under heavy torque, but these set screws held firm even in a tight spot. The zinc finish makes them easy to see against dark metal, which is a nice bonus for quick adjustments.

Ava M. ★★★★★

The knurled cup point bites nicely into the shaft without slipping, and the zinc plating seems durable enough for repeated adjustments. I used these for a threaded insert application, and the hex drive made tightening them in cramped spots much easier than a regular screw.