Drill Screws

1. Drill Screw: Types and Characteristics of Head Shapes

2. Recess:

 

3. Drill Screw: Types and Characteristics of Thread Profiles (or Thread Forms)

 

4. Drill Screw: Materials and Surface Treatments

 

5. Applications for Drill Screws

 
 

6. Applicable Steel Plate and Material Thickness

• Fastening Board Steel Plate to Steel Plate

 

• Fastening Board/Panel to Steel Plate

By using Pilot-Point or Reamer-Equipped drill screws, the issue of the fastened material lifting is eliminated, and the maximum effective length becomes the upper limit of the applicable thickness.
 

• Fastening Board Materials Between Two Steel Plates

PL (Pilot Section Length) > T (Applicable Thickness) ensures that the upper steel plate does not lift.
 

• Fastening Board Materials or Wooden Materials to a Steel Substrate

 

7. Other Technical Notes

Drill Screw Engagement Ratio for a drill screw is calculated approximately as:
(A higher engagement ratio corresponds to higher screw strength.)

• Hydrogen Embrittlement

Hydrogen Embrittlement is a phenomenon where the strength (ductility or toughness) of steel material is reduced due to hydrogen absorption into the steel. Hydrogen embrittlement is caused by hydrogen absorption resulting from processes such as corrosion, welding, pickling, and electroplating.