Spiral Self-Drilling Screws

Spiral self-drilling screws are Sun Through's signature product. Only the top professionals with solid skills in heat treatment and bi-metal welding can make this special product happen. The twist geometry significantly increases drilling capacity up to 25 mm with zero failure rate. Also, the shape facilitates material removal during drilling, saving working time by up to 50%, compared to regular self-drilling screws. Options of all carbon steel and bi-metal are available.
                                         Carbon Steel and 410
Drilling point size Q5 Q6 Q7  Q8 Q9 Q10
Drilling capacity  12mm 15mm 18mm 21mm 25mm 30mm
Nominal size customized from M4.8 to M7.0
Length customized from 38mm~350mm
             
             
                                            Bi-metal                                                        
Drilling point size Q5 Q6 Q7  Q8 Q9  
Drilling capacity  12mm 15mm 18mm 21mm 25mm  
Nominal size customized from M4.8 to M7.0
Length customized from 38mm~350mm

 

*** specifications can be customized, contact us for specific specs***

Plating: Cr3+/ Cr6+ Zinc plating with choice of colors

Optional post plating finish: 500Hrs /1000 Hrs Silver Ruspert coating

Optional features: shank tap-cut, 3Y thread line cutting, wings for wood+steel substrate, with washers.