M24×3.0 tap drill size
Use a 21.0mm drill (21.00 mm) for a M24×3.0 cutting tap at 75% thread.
| Tap type | Drill | Decimal (mm) |
|---|---|---|
| Cutting tap, 75% thread | 21.0mm | 21.00 |
| Cutting tap, 50% thread (hard material) | 21.5mm | 21.50 |
| Roll / form tap, 65% thread | 22.65 mm | 22.65 |
| Helicoil / STI insert (M24×3.0×1D) | 25.5mm | 25.50 |
- Pitch
- 3 mm
- Major Ø
- 24.00
- Pitch Ø
- 22.05
- Minor Ø
- 20.75
Common questions
- What size drill for a M24×3.0 tap?
- Use a 21.0mm drill (21.00 mm) for a M24×3.0 cutting tap at 75% thread.
- What drill for a M24×3.0 roll (form) tap?
- About 22.67 mm; the nearest standard drill is 22.65 mm. Check your tap maker's table.
- What drill for a M24×3.0 Helicoil?
- Drill 25.5mm (25.50 mm), then tap with the M24×3.0 STI tap.
Other Metric sizes
Drill sizes from Machinery's Handbook and ASME B1.1/B1.13M; roll tap sizes from the form-tap formula. Tap and insert makers' tables are authoritative.