ISO Metric Conduit
Metric thread - 60° profile
| Size | Pitch mm | Ext Major mm | Int Minor mm | Tap Drill Size mm |
|---|---|---|---|---|
| M16 | 1.50 | 16.0 | 14.376 | 14.5 |
| M20 | 1.50 | 20.0 | 18.376 | 18.5 |
| M25 | 1.50 | 25.0 | 23.376 | 23.5 |
| M32 | 1.50 | 32.0 | 30.376 | 30.5 |
| M40 | 1.50 | 40.0 | 38.376 | 38.5 |
| M50 | 1.50 | 50.0 | 48.376 | 48.5 |