Thread Cutting Screws


PDF iconThread Cutting Dimensions

Thread Cutting Screws - For Plastic and Other Low Density Materials

Another Shakeproof invention, the thread cutting screws utilize an off-center shank slot to provide a true cutting action. There are several types depending on the application.

  • Eliminates the need for a separate tapping operation
  • Generates a perfectly formed mating thread providing a stronger joint
  • Reusable with continuous performance
  • Thread cutting feature can be designed into other screws
  • Type 1- recommended for steel parts having a thickness less than half of the screw diameter.
  • Type 23- have a wider shank slot and are recommended for use in cast iron and soft metals such as zinc and aluminum castings.
  • Type 25- combines a wide thread cutting shank slot and acute cutting edge with spaced threads for a low drive to strip ratio and is best for thermoset plastic.
  • Type 17- drills its own hole and cuts close mating threads in wood, light plastics, and particle board.