METRIC ELECTRICAL THREADS
| SIZE | TPI | MAJOR (EXT) | MINOR (INT) | TAP DRILL |
| PG 7 | 20 | 12.50 | 11.28 | 11.40 |
| PG 9 | 18 | 15.20 | 13.86 | 14.00 |
| PG 11 | 18 | 18.60 | 17.26 | 17.25 |
| PG 13.5 | 18 | 20.40 | 19.06 | 19.00 |
| PG 16 | 18 | 22.50 | 21.16 | 21.25 |
| PG 21 | 16 | 28.30 | 26.78 | 26.75 |
| PG 29 | 16 | 37.00 | 35.48 | 35.50 |
| PG 36 | 16 | 47.00 | 45.48 | 45.50 |
| PG 42 | 16 | 54.00 | 52.48 | 52.50 |
| PG 48 | 16 | 59.30 | 57.78 | 57.75 |