DIN 7982
Countersunk Head Tapping Screws
With cross recess or hexalobular drive
Type C-H = with cone end and Philips cross recess H
Type C-Z = with cone end and Pozidriv cross recess Z
Type C-IRS = with cone end and hexalobular drive
Type F-H = with flat end and Philips cross recess H
| Thread Size | ST2.2 | ST2.9 | ST3.5 | (ST3.9) | ||
|---|---|---|---|---|---|---|
| P | Pitch | 0.8 | 1.1 | 1.3 | 1.3 | |
| a | max | 0.8 | 1.1 | 1.3 | 1.3 | |
| dk | max=nominal size | 4.3 | 5.5 | 6.8 | 7.5 | |
| min | 4 | 5.2 | 6.44 | 7.14 | ||
| k | ≈ | 1.3 | 1.7 | 2.1 | 2.3 | |
| y | max | Type C | 2 | 2.6 | 3.2 | 3.5 |
| Type F | 1.6 | 2.1 | 2.5 | 2.7 | ||
| Socket No. | 1 | 1 | 2 | 2 | ||
| M1 | ≈ | 2.5 | 3 | 4.2 | 4.6 | |
| M2 | ≈ | 2.4 | 2.8 | 4 | 4.2 | |
| Thread Size | ST4.2 | ST4.8 | ST5.5 | ST6.3 | ||
|---|---|---|---|---|---|---|
| P | Pitch | 1.4 | 1.6 | 1.8 | 1.8 | |
| a | max | 1.4 | 1.6 | 1.8 | 1.8 | |
| dk | max=nominal size | 8.1 | 9.5 | 10.8 | 12.4 | |
| min | 7.74 | 9.14 | 10.37 | 11.97 | ||
| k | ≈ | 2.5 | 3 | 3.4 | 3.8 | |
| y | max | Type C | 3.7 | 4.3 | 5 | 6 |
| Type F | 2.8 | 3.2 | 3.6 | 3.6 | ||
| Socket No. | 2 | 2 | 3 | 3 | ||
| M1 | ≈ | 4.7 | 5.1 | 6.8 | 7.1 | |
| M2 | ≈ | 4.4 | 5 | 6.3 | 7 | |
*dimension not ISO standardized, values from DIN 7982
All information is strictly informative