
Unit : mm Unit : mmUnit : mm Unit : mm
Minor Diameter of JIS internal thread (D ) Bored hole size Minor Diameter of JIS internal thread (DMinor Diameter of JIS internal thread (D) ) Bored hole sizeBored hole sizeBored hole size Bored hole size
Size 1 SizeSize 1 1
| ( ref.) | Max. | Min. | ( ref.)( ref.)( ref.) | ( ref.) | |||
| 6.50 | PF | 1/16 - 28 | 6.843 | 6.561 | 6.77 6.50 6.77 | 6.77 | |
| PF | 1/8 - 28 | 8.848 | 8.566 | 8.78 | |||
| 8.50 | 8.78 8.50 | 8.78 | |||||
| PF | 1/4 - 19 | 11.890 | 11.445 | 11.78 | |||
| 11.30 | 11.78 11.30 | 11.78 | |||||
| PF | 3/8 - 19 | 15.395 | 14.950 | 15.28 | |||
| 14.90 | - 14 | 15.28 14.90 | 15.28 | ||||
| PF | 1/2 | 19.172 | 18.631 | 19.0 | |||
| 18.5 | PF | 5/8 - 14 | 21.128 | 20.587 | 19.0 18.5 21.0 | 19.0 | |
| 24.0 | PF | 3/4 - 14 | 24.658 | 24.117 | 21.0 24.0 24.5 | 21.0 | |
| 30.2 | PF | 7/8 - 14 | 28.418 | 27.877 | 24.5 30.2 28.3 | 24.5 | |
| 38.8 | PF 1 | - 11 | 30.931 | 30.291 | 28.3 38.8 30.8 | 28.3 | |
| PF 1 1/8 -11 | 35.579 | 34.939 | 35.4 | ||||
| 44.7 | 30.8 44.7 | 30.8 | |||||
| PF 1 1/4 -11 | 39.592 | 38.952 | 39.4 | ||||
| 56.5 | 35.4 56.5 | 35.4 | |||||
| PF 1 1/2 -11 | 45.485 | 44.845 | 45.3 | ||||
| PF 1 3/4 -11 | 51.428 | 50.788 | 39.4 51.3 | 39.4 | |||
| PF 2 | - 11 | 57.296 | 56.656 | 45.3 57.1 | 45.3 | ||
| PF 2 1/2 -11 | 72.866 | 72.226 | 51.3 72.7 | 51.3 | |||
| PF 3 | - 11 | 85.566 | 84.926 | 57.1 85.4 | 57.1 | ||
| PF 3 1/2 -11 | 98.012 | 97.372 | 97.9 | ||||
| PF 4 | - 11 | 110.712 | 110.072 | 110.6 |
Unit : mm Unit : mm Minor diameter of internal threads Bored hole size Minor diameter of internal threads Bored hole size Size Size
| Max. | Min. | ( ref.) | Max. | Min. | ( ref.) | ||||
| 1/16 - 27 | NPSC | 6.604 | 6.300 | 6.53 | 1/16 - 27 | NPSM | 6.908 | 6.731 | 6.86 |
| 1/8 - 27 | NPSC | 8.940 | 8.636 | 8.86 | 1/8 - 27 | NPSM | 9.245 | 9.094 | 9.21 |
| 1/4 - 18 | NPSC | 11.633 | 11.227 | 11.53 | 1/4 - 18 | NPSM | 12.217 | 11.888 | 12.13 |
| 3/8 - 18 | NPSC | 15.087 | 14.656 | 14.98 | 3/8 - 18 | NPSM | 15.544 | 15.317 | 15.49 |
| 1/2 - 14 | NPSC | 18.643 | 18.161 | 18.5 | 1/2 - 14 | NPSM | 19.278 | 18.974 | 19.2 |
| 3/4 - 14 | NPSC | 24.003 | 23.495 | 23.9 | 3/4 - 14 | NPSM | 24.638 | 24.334 | 24.6 |
| 1 - 11 1/2 | NPSC | 30.073 | 29.490 | 29.9 | 1 - 11 1/2 | NPSM | 30.759 | 30.506 | 30.7 |
| 1 1/4 - 11 1/2 | NPSC | 38.836 | 38.253 | 38.7 | 1 1/4 - 11 1/2 | NPSM | 39.497 | 39.269 | 39.4 |
| 1 1/2 - 11 1/2 | NPSC | 44.907 | 44.323 | 44.8 | 1 1/2 - 11 1/2 | NPSM | 45.567 | 45.339 | 45.5 |
| 2 - 11 1/2 | NPSC | 56.946 | 56.363 | 56.8 | 2 - 11 1/2 | NPSM | 57.607 | 57.379 | 57.6 |
Unit : mm Minor diameter of internal threads Bored hole size Size
| Max. | Min. | ( ref.) | ||
| 1/16 - 27 | NPSF | 6.482 | 6.305 | 6.44 |
| 1/8 - 27 | NPSF | 8.829 | 8.652 | 8.78 |
| 1/4 - 18 | NPSF | 11.455 | 11.232 | 11.40 |
| 3/8 - 18 | NPSF | 14.892 | 14.672 | 14.84 |
| 1/2 - 14 | NPSF | 18.374 | 18.118 | 18.3 |
| 3/4 - 14 | NPSF | 23.721 | 23.465 | 23.7 |
| 1 - 11 1/ | NPSF | 29.758 | 29.464 | Technical Inf 29.7 |
2
| 1 1/4 - 11 1/2 | NPSF | 38.514 | 38.220 | 38.4 | |
| 1 1/2 - 11 1/2 | NPSF | 44.584 | 44.290 | 44.5 | |
| 2 - 11 1/2 | NPSF | 56.621 | 56.328 | 56.5 |