Self-drilling screw is a fastener that can drill its own hole into a material as it’s screwed in. They have a sharp point and cutting threads that create the hole and pull the screw into place. The point acts like a drill bit to create the hole.
Self-drilling screws have a drill-like tip that creates a hole and forms threads in a single step. Some self-drilling screws have point wings that widen the hole in thicker materials, allowing the thread to pass through without touching the material.
Self-drilling screws are used in many construction and repair projects,Can be used in wood, metal, and other materials. Including metal roofing, HVAC, and steel framing,furniture assembling,vehicle repairing,electronic equipment, communication equipment. They can also be used to fasten wood to metal, and to attach sheets of metal together.Self-drilling screws are used to attach materials together in these structures.
DIN7504K Hex Flanged Head self-drilling screw
Hexagon Washer Head Drilling Screws With Tapping Screw Thread
The drawings and parameter tables are as follows：
| Thread Size
d |
ST | ||||||||
| 2.9 | 3.5 | 3.9 | 4.2 | 4.8 | 5.5 | 6.3 | |||
| P | Pitch | 1.1 | 1.3 | 1.3 | 1.4 | 1.6 | 1.8 | 1.8 | |
| a | max | 1.1 | 1.3 | 1.3 | 1.4 | 1.6 | 1.8 | 1.8 | |
| c | min | 0.4 | 0.6 | 0.6 | 0.8 | 0.9 | 1 | 1 | |
| dc | max | 6.3 | 8.3 | 8.3 | 8.8 | 10.5 | 11 | 13.5 | |
| min | 5.8 | 7.6 | 7.6 | 8.1 | 9.8 | 10 | 12.2 | ||
| e | min | 4.28 | 5.96 | 5.96 | 7.59 | 8.71 | 8.71 | 10.95 | |
| k | max | 2.8 | 3.4 | 3.4 | 4.1 | 4.3 | 5.4 | 5.9 | |
| min | 2.5 | 3 | 3 | 3.6 | 3.8 | 4.8 | 5.3 | ||
| kw | min | 1.3 | 1.5 | 1.5 | 1.8 | 2.2 | 2.7 | 3.1 | |
| r | max | 0.4 | 0.5 | 0.5 | 0.6 | 0.7 | 0.8 | 0.9 | |
| s | max | 4 | 5.5 | 5.5 | 7 | 8 | 8 | 10 | |
| min | 3.82 | 5.32 | 5.32 | 6.78 | 7.78 | 7.78 | 9.78 | ||
| dp | 2.3 | 2.8 | 3.1 | 3.6 | 4.1 | 4.8 | 5.8 | ||
| Drilling range(thickness) | 0.7~1.9 | 0.7~2.25 | 0.7~2.4 | 1.75~3 | 1.75~4.4 | 1.75~5.25 | 2~6 | ||
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