Drive screws are permanent, hammer driven fasteners for joining metals and plastics. They requires a pre-drilled hole for installation and are often used to fasten castings.
| Screw Thread d | Φ1.9 | Φ2.5 | Φ2.9 | Φ3.5 | Φ4.2 | ||
| d | max | 1.9 | 2.54 | 2.94 | 3.55 | 4.24 | |
| min | 1.82 | 2.46 | 2.85 | 3.46 | 4.1 | ||
| dk | max | 3.22 | 4.1 | 5.35 | 6.6 | 7.84 | |
| min | 3 | 3.7 | 4.9 | 6.06 | 7.24 | ||
| k | max | 1.24 | 1.75 | 2.18 | 2.6 | 3.05 | |
| min | 1.05 | 1.5 | 1.9 | 2.3 | 2.7 | ||
| P | 0.838 | 0.785 | 1.08 | 1.3 | 1.33 | ||
| dp | max | 1.6 | 2.1 | 2.43 | 2.94 | 3.45 | |
| min | 1.52 | 2.03 | 2.33 | 2.84 | 3.35 | ||