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What is a self tapping Screw

Posted by Fastenere on

A self tapping screw is a screw that creates threads in the material that it is being fastened, unlike its machine screw counterpart.

Self tapping screws are available in many different styles

Thread Forming

  • Type A : Most common style with wide spaced threads and a sharp point
    type a point screw
  • Type AB : Closely spaced threads with a sharp point
    type ab screw point
  • Type B: Spaced threads with a blunt point
    type b screw point

Thread Cutting

  • Type F : Machine screw thread with a tapered blunt point and multiple cutting edges
    type f screw point
  • Type 1 : Machine screw thread with a tapered blunt point and a single cutting edge
    type 1 screw point
  • Type 23: Machine screw thread with a tapered blunt point and a single cutting edge
    type 23 screw point
  • Type 25 : Spaced threads with a tapered blunt point and a single cutting edge
    type 25 screw point

Self Drilling

  • Type BSD: Most common style with wide spaced threads and a drilling point
    type bsd screw point
  • Type CSD: Fine thread that reduces friction in thick materials and a drilling point
    type csd screw point

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