
Trapezoidal Threads (Tr) Unit: mm
| Size | Minor D Max. | iameter Min. | Drill Size | Recommended Hole Size | |||
| Tr | 10 | × | 2 | 8.236 | 8.000 | 8.20 | 8.18 |
| Tr | 12 | × | 2 | 10.236 | 10.000 | 10.20 | 10.20 |
| Tr | 12 | × | 3 | 9.315 | 9.000 | 9.20 | 9.20 |
| Tr | 14 | × | 3 | 11.315 | 11.000 | 11.20 | 11.20 |
| Tr | 16 | × | 3 | 13.315 | 13.000 | 13.20 | 13.20 |
| Tr | 16 | × | 4 | 12.375 | 12.000 | 12.25 | 12.30 |
| Tr | 18 | × | 4 | 14.375 | 14.000 | 14.25 | 14.30 |
| Tr | 20 | × | 4 | 16.375 | 16.000 | 16.25 | 16.30 |
| Tr | 22 | × | 5 | 17.450 | 17.000 | 17.25 | 17.30 |
| Tr | 24 | × | 5 | 19.450 | 19.000 | 19.25 | 19.30 |
| Tr | 25 | × | 5 | 20.450 | 20.000 | 20.25 | 20.30 |
| Tr | 26 | × | 5 | 21.450 | 21.000 | 21.25 | 21.30 |
| Tr | 26 | × | 6 | 20.500 | 20.000 | 20.30 | 20.40 |
| Tr | 28 | × | 5 | 23.450 | 23.000 | 23.25 | 23.30 |
| Tr | 30 | × | 6 | 24.500 | 24.000 | 24.30 | 24.40 |
THREADS,