Materials include carbon steel and stainless steel for your choice. Surface treatments (except for stainless steel) include:
Cold galvanizing (average zinc layer thickness >5μm), suitable for ordinary environments.
Dakro (can pass the salt spray test for more than 120 hours) is applied in environments with high anti-corrosion requirements.
Concrete screws can be used for anchoring concrete to external structural components. Due to its material, which is all 8.8 grade or above carbon steel, the threads will not be damaged after installation, and they can be removed by adjusting the installation tool's rotation direction, making them reusable. Daring can also produce concrete screws made of 410 stainless steel with anti-corrosion surface treatment, which can be used in most corrosive environments.
Type Drilling diameter(mm) Drilling depth(mm) Maximum fastener thickness(mm) Installation torque(N.m) M8*80 8 80 10 ≦20 M10*100 10 100 15 ≦40 M12*120 12 120 20 ≦60 M14*140 14 140 25 ≦80