SELF-DRILLING SCREWS

A Self-Drilling Screw is a Self-Tapping Screw with the added feature of a drill point. The drill point looks a lot like the point of a drill. It will drill a hole and form the mating threads in one operation.

Various Head Styles and types are available in different materials for use in a number of applications.

  • Materials.
  • Carbon Steel

Stainless Steel AISI-304

Stainless Steel AISI-316

 

Bi-Metal – SS-304 with Carbon Steel Drill point.

Stainless Steel AISI-410

 

  • FINISH/COATING
  • Zinc Electroplated
  • Class-3 Coating
  • Passivated

 

  • HEAD TYPES
  • Hex with Flange
  • As per DIN-7504K

Use with EPDM washer for roofing to provide a leak-proof fixing.

Download Datasheet


  • PAN Phillips
  • As per DIN-7504M
  • General purpose head style. Useful for stitching sheets and various assemblies attaching metal to metal
  • Download Datasheet

 

 

 


  • CSK Phillips

 

As per DIN-7504O

For a flush fixing. Useful for fixing wood to metal.

 

Download Datasheet

 


 

 

Wafer Head with Phillips

Truss with Phillips

 

 

 

Special Considerations

Drill-Point Material is generally plain carbon steel which is less stable at high temperatures than equivalent high-speed steel (HSS) drill-bits. To reduce wear on the drill point, fasten using a drill motor rather than an impact driver or hammer drill.

High Temperature Stability affects how quickly the drill point fails due to the heat generated by the drilling operation. Refer to the troubleshooting guide at the end of this section for some visual examples.

Drilling Temperature is directly proportional to motor RPM, applied force, and work material hardness. As each value increases, so does the heat generated by the drilling operation.

Reducing Applied Force can increase durability and allow the drill point to penetrate thicker materials (i.e., remove more material before failing due to heat buildup).

Reducing Motor RPM can improve performance in harder materials by allowing the user to push harder during the drilling process and extending the life of the drill point.