DIN 7973
DIN 7973 – Slotted Raised Countersunk Head Self-tapping Screws Dimension
Dimensionn of DIN 7973 as below:
 |
| Size | ST2.2 | ST2.9 | ST3.5 | ST4.2 | ST4.8 | ST5.5 | ST6.3 | |
| P | 0.8 | 1.1 | 1.3 | 1.4 | 1.6 | 1.8 | 1.8 | |
| a | max. | 0.8 | 1.1 | 1.3 | 1.4 | 1.6 | 1.8 | 1.8 |
| dk | max. | 4.3 | 5.5 | 6.8 | 8.1 | 9.5 | 10.8 | 12.4 |
| min. | 4 | 5.2 | 6.44 | 7.74 | 9.14 | 10.37 | 11.97 | |
| f | approx. | 0.7 | 0.9 | 1.2 | 1.4 | 1.5 | 1.7 | 2 |
| k | approx. | 1.3 | 1.7 | 2.1 | 2.5 | 3 | 3.4 | 3.8 |
| n | nominal | 0.6 | 0.8 | 1 | 1.2 | 12 | 1.6 | 1.6 |
| min. | 0.66 | 0.86 | 1.06 | 1.26 | 1.26 | 1.66 | 1.66 | |
| max. | 0.8 | 1 | 1.2 | 1.51 | 1.51 | 1.91 | 1.91 | |
| r | max. | 0.8 | 1.1 | 1.4 | 1.6 | 1.9 | 2.1 | 2.4 |
| rf | approx. | 3.8 | 4.6 | 5.4 | 6.6 | 8.2 | 9.4 | 11.1 |
| t | min. | 0.95 | 1.25 | 1.55 | 1.85 | 2.15 | 2.42 | 2.85 |
| max. | 1.15 | 1.5 | 1.9 | 2.25 | 2.6 | 2.95 | 3.45 | |
| y | Type C | 2 | 2.6 | 3.2 | 3.7 | 4.3 | 5 | 6 |
| max. | Type F | 1.6 | 2.1 | 2.5 | 2.8 | 3.2 | 3.6 | 3.6 |