DIN 7973 Slotted raised countersunk head tapping screws Dimensions
| Thread | p | a | dk | f | k | n | r | rf | t | y max | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| max | nominal=max | min | approx | approx | nominal | min | max | max | approx | min | max | Type C | Type F | ||
| ST 2.2 | 0.8 | 0.8 | 4.3 | 4 | 0.7 | 1.3 | 0.66 | 0.66 | 0.8 | 0.8 | 3.8 | 0.95 | 1.15 | 2 | 1.6 |
| ST 2.9 | 1.1 | 1.1 | 5.5 | 5.2 | 0.9 | 1.7 | 0.86 | 0.86 | 1 | 1.1 | 4.6 | 1.25 | 1.5 | 2.6 | 2.1 |
| ST 3.5 | 1.3 | 1.3 | 6.8 | 6.44 | 1.2 | 2.1 | 1.06 | 1.06 | 1.2 | 1.4 | 5.4 | 1.55 | 1.9 | 3.2 | 2.5 |
| ST 3.9 | 1.3 | 1.3 | 7.5 | 7.14 | 1.3 | 2.3 | 1.06 | 1.06 | 1.2 | 1.5 | 6 | 1.7 | 2.05 | 3.5 | 2.7 |
| ST 4.2 | 1.4 | 1.4 | 8.1 | 7.74 | 1.4 | 2.5 | 1.26 | 1.26 | 1.51 | 1.6 | 6.6 | 1.85 | 2.25 | 3.7 | 2.8 |
| ST 4.8 | 1.6 | 1.6 | 9.5 | 9.14 | 1.5 | 3 | 1.26 | 1.26 | 1.51 | 1.9 | 8.2 | 2.15 | 2.6 | 4.3 | 3.2 |
| ST 5.5 | 1.8 | 1.8 | 10.8 | 10.37 | 1.7 | 3.4 | 1.66 | 1.66 | 1.91 | 2.1 | 9.4 | 2.42 | 2.95 | 5 | 3.6 |
| ST 6.3 | 1.8 | 1.8 | 12.4 | 11.97 | 2 | 3.8 | 1.66 | 1.66 | 1.91 | 2.4 | 11.1 | 2.85 | 3.45 | 6 | 3.6 |