Project Description
Self-drilling screw is mainly used for fixing the color steel tiles of the steel structure and can also be used for fixing the thin plates of simple buildings.
The tail part of the drilling screw is in the form of a drilling or a pointed shape. No pre-drilling is required. Drilling, tapping and locking can be directly performed on the setting materials and basic materials, which greatly increase work efficiency. Compared with ordinary screws, it has high tenacity and retention force, and will not loose after a long time of combination.
DIN 7504K
Material:SUS304,SUS316,SUS410
D:ST4.2~ST6.3
Length:13~100mm
Standard:DIN ANSI BS
| d | ST2.9 | ST3.5 | (ST3.9) | ST4.2 | ST4.8 | ST5.5 | ST6.3 | |
| P | Pitch | 1.1 | 1.3 | 1.3 | 1.4 | 1.6 | 1.8 | 1.8 |
| h | 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 | |
| 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 | |
| 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 | |
| Steel 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 | |
