THE SOLUTION

AISI 300 Series based bi-metal self-drilling and self-tapping screws:

The solution to manufacture the most ideal self-drilling and self-tapping screw, is to:

• Combining the main part of a screw made out of AISI 300 series Stainless Steel. 
• Having a drill-point and the first tapping threads in hardened Carbon Steel.
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• • The hardened Carbon Steel part (drill point and first threads) will do the drilling and tapping which is then followed by the stainless steel part going into the application and forms the permanent fixing.
  • This solution brings together all the best from 2 worlds, where the main screw act and works exactly as the original China manufactured self-tapping screws – just with the extra feature where the installers saves a lot of time with self-drilling and self-tapping such screws doing all processes in one go.
  • Now it is possible to make construction solutions using suitable real stainless steel for all outdoor use in tough environments; coastal and industrial area, etc.
    
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  • Self-drilling and self-tapping screws is of course needed in our modern world where “time is money” and where fast installation speed is expected in all cases. Now it is just possible to realize fast installation without sacrificing anything – the ideal combination of fast installation speed getting a self-drilling and self-tapping screw with the best corrosion performance in non-brittle and ductile qualities.
    
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