Slotted countersunk head tapping screws
DIN7973
Diameter range: ST2.2-ST6.3 Length range: 6.5mm-100mm
| standard | DIN German standard |
|---|---|
| head shape | half sunken head |
| Groove | slot |
| Thread | Fully threaded |
| (mm) | ST2.2 | ST2.9 | ST3.5 | ST3.9 | ST4.2 | ST4.8 | ST5.5 | ST6.3 |
|---|---|---|---|---|---|---|---|---|
| P | 1.1 | 1.34 | 1.6 | 1.8 | 0.8 | 1.1 | 1.3 | 1.3 |
| a(max) | 0.8 | 1.1 | 1.3 | 1.3 | 1.4 | 1.6 | 1.8 | 1.8 |
| dk(max) | 4.3 | 5.5 | 6.8 | 7.5 | 8.1 | 9.5 | 10.8 | 12.4 |
| dk(min) | 4 | 5.2 | 6.44 | 7.14 | 7.74 | 9.14 | 10.37 | 11.97 |
| f | 0.7 | 0.9 | 1.2 | 1.3 | 1.4 | 1.5 | 1.7 | 2 |
| k | 1.3 | 1.7 | 2.1 | 2.3 | 2.5 | 3 | 3.4 | 3.8 |
| n(min) | 0.66 | 0.86 | 1.06 | 1.06 | 1.26 | 1.26 | 1.66 | 1.66 |
| n(max) | 0.8 | 1 | 1.2 | 1.2 | 1.51 | 1.51 | 1.91 | 1.91 |
| t(min) | 0.95 | 1.25 | 1.55 | 1.7 | 1.85 | 2.15 | 2.45 | 2.85 |
| t(max) | 1.15 | 1.5 | 1.9 | 2.05 | 2.25 | 2.6 | 2.95 | 3.45 |
