What are set screws? A set screw is a type of screw generally used to secure an object within or against another object, normally not using a nut. The most common examples are securing a pulley or gear to a shaft. Set screws are usually headless (also called blind), meaning that the screw is fully threaded and has no head projecting past the major diameter of the screw thread. If a set screw has a head, the thread will extend all the way to the head.

what are set screws

A blind set screw is almost always driven with an internal-wrenching drive, such as a hex socket (Allen), star (Torx), square socket (Robertson), or slot.

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The set screw passes through a threaded hole in the outer object and is tightened against the inner object to prevent it from moving relative to the outer object. It exerts compressional or clamping force through the bottom tip that projects through the hole.

Point types of set screws

Set screws appear with a variety of tip (point) types. The different shaped tips have different properties that engineers can utilize. If an engineer were to use a detent to ensure proper nesting of the screw, they might choose to use a cone point type of screw. One might often need to use a flat point when the screw must press perfectly flat against a surface. The most common type is the cup point. This type works well because the surface is rounded so that a small surface area is in contact, but it does not have extremely high stress at one point like that of a cone point. Durability studies show that the cup point offers superior resistance to wear while maintaining a strong grip. Knurled cup points offer the added advantage of a locking action (similar to that of a serrated lock washer) that prevents the screws from working loose in high-vibration applications.

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Common points include the following:

  • Flat point
  • Domed point
  • Cone point
  • Cup point
  • Extended point (pilot point, dog point)
  • Knurled cup point

About us

Yuhuang Electronic Technology Co., Ltd. – Manufacturer, supplier and exporter of set screws. Set screw is a type of screw generally used to secure an object within or against another object, normally not using a nut. Our set screws are durable and versatile for any application. Custom design screws are available. Yuhuang is well known for the capabilities to manufacture custom screws. Our highly skilled team will work closely with customers to provide solutions.

Learn more about us

For more information about set screw from us at www.yhscrew.com, please email us at info@www.yhscrew.com. We look forward to hearing from you.