Hex Socket Flat Head Self Drilling Bimetal tek Screws
Premium Hex Socket Flat Head Self Drilling Bimetal Screws. Bimetallic composite design combines stainless steel anti‑corrosion performance and carbon steel drilling hardness, self‑drilling without pre‑drilling, widely used in construction, metal engineering and metal‑to‑metal connections.
Core Features:
Dual-Material Innovation :
- Body: Grade 304/316 Stainless Steel for ultimate corrosion resistance in harsh environments.
- Drill Point: Hardened Carbon Steel tip to pierce through heavy-gauge steel without pre-drilling.
Hex Socket Drive :
- Provides higher torque transmission compared to Phillips heads.
- Reduces cam-out and head stripping, ensuring a faster and safer installation.
Flat Countersunk Head:
- Provides a flush finish for a clean, professional aesthetic.
- Ideal for applications where a smooth surface is required (e.g., window frames, solar rails).
Exceptional Drilling Capacity :
- Capable of drilling through carbon steel plates up to 6mm-12mm (depending on screw diameter).
| Diameter(mm) | Self-drilling Capability(mm) | Effective Fixed Thickness(mm) | Washer | Screw Size | Surface |
| 6.3mm/14# | 3.0 | <6 | EPDM | 1/4-14x3/4" | Ruspert 500H-3000H |
| 5.5mm/12# | 7.0 | <10 | EPDM | 5.5-14x1" | Ruspert 500H-3000H |
| 5.5mm/12# | 7.0 | <16 | EPDM | 5.5-14x1-1/4" | Ruspert 500H-3000H |
| 5.5mm/12# | 7.0 | <22 | EPDM | 5.5-14x1-1/2" | Ruspert 500H-3000H |
Hex Socket Flat Head Self Drilling Bimetal tek Screws
| Material Chemical composition(%) | C | Mn | P | S | Si | Cr | Ni | Mo |
| Max. | Max. | Max. | Max. | Max. | Max. | Max. | Max. | |
| SS304 | 0.08 | 2 | 0.045 | 0.03 | 1.00 | 18.0-20.0 | 8.0-11.0 | - |
| SS316 | 0.08 | 2 | 0.045 | 0.03 | 1.00 | 16.0-18.0 | 10.0-14.0 | 2.0-3.0 |
| SS420 | 0.16-0.25 | 1.0 | 0.04 | 0.03 | 1.00 | 12.0-14.0 | 0.6 | - |
| SCM435 | 0.33-0.38 | 0.6-0.9 | 0.03 | 0.03 | 0.15-0.35 | 0.9-1.2 | 0.25 | 0.15-0.3 |