Dimensions for ISO 14587 Hexalobular socket raised countersunk (oval) head tapping screws
| thread | a | dk max | f | k max | y - Type C | y - Type F | TORX | A | t max |
|---|---|---|---|---|---|---|---|---|---|
| ST 2.9 | 1.1 | 6.3 | 0.7 | 1.7 | 2.6 | 2.1 | 10 | 2.8 | 1.27 |
| ST 3.5 | 1.3 | 8.2 | 0.8 | 2.35 | 3.2 | 2.5 | 15 | 3.35 | 1.4 |
| ST 4.2 | 1.4 | 9.4 | 1 | 2.6 | 3.7 | 2.8 | 20 | 3.95 | 1.8 |
| ST 4.8 | 1.6 | 10.4 | 1.2 | 2.8 | 4.3 | 3.2 | 25 | 4.5 | 2.03 |
| ST 5.5 | 1.8 | 11.5 | 1.3 | 3 | 5 | 3.6 | 25 | 4.5 | 2.03 |
| ST 6.3 | 1.8 | 12.6 | 1.4 | 3.15 | 6 | 3.6 | 30 | 5.6 | 2.42 |