Dimensions of Hexagon Washer Head Drilling Screws with Tapping Screw Thread (Thread Forming Screws for ISO Threads)
| Dimensions | f. sheet thicknesses | dp max | dc min | k max | s |
|---|---|---|---|---|---|
| St 2.9 | 0.7 to 1.9 | 2.3 | 6.3 | 2.8 | 4.0 |
| St 3.5 | 0.7 to 2.25 | 2.8 | 8.3 | 3.4 | 5.5 |
| St 4.2 | 1.75 to 3.0 | 3.6 | 8.8 | 4.1 | 7.0 |
| St 4.8 | 1.75 to 4.4 | 4.1 | 10.5 | 4.3 | 8.0 |
| St 5.5 | 1.75 to 5.25 | 4.8 | 11.0 | 5.4 | 8.0 |
| St 6.3 | 2.0 to 6.0 | 5.8 | 13.5 | 5.9 | 10.0 |