
Unit:mm Unit:mm
| Minor diameter of i | nternal threads(D1) | Tap drill hole size | ||
| Size | Max. | Min. | (reference) | |
| BC | 5/16 - | 26 7.16 | 7.06 | 7.14 |
| BC | 3/8 - | 26 8.75 | 8.65 | 8.73 |
| BC | 7/16 - | 26 10.33 | 10.23 | 10.31 |
| BC | 1/2 - | 20 11.66 | 11.55 | 11.63 |
| BC | 9/16 - | 20 13.25 | 13.14 | 13.22 |
| BC | 5/8 - | 20 14.84 | 14.73 | 14.81 |
| BC | 11/16 - | 24 16.59 | 16.48 | 16.56 |
| BC | 3/4 - | 30 18.40 | 18.29 | 18.37 |
| BC | 31/32 - | 30 23.96 | 23.85 | 23.93 |
| BC | 1 - | 24 24.58 | 24.46 | 24.55 |
| BC | 1.29 - | 24 31.96 | 31.83 | 31.93 |
| BC | 1.37 - | 24 33.99 | 33.86 | 33.96 |
| BC | 1 7/16 - | 24 35.70 | 35.57 | 35.67 |
| BC | 1.45 - | 24 36.02 | 35.89 | 35.99 |
| BC | 1 9/16 - | 24 38.88 | 38.75 | 38.85 |
| Minor diameter of i | nternal threads(D1) | Tap drill hole size | ||
| Size | Max. | Min. | (reference) | |
| Pg | 7 - | 20 11.43 | 11.28 | 11.39 |
| Pg | 9 - | 18 14.01 | 13.86 | 13.97 |
| Pg | 11 - | 18 17.41 | 17.26 | 17.37 |
| Pg | 13.5 - | 18 19.21 | 19.06 | 19.17 |
| Pg | 16 - | 18 21.31 | 21.16 | 21.27 |
| Pg | 21 - | 16 27.03 | 26.78 | 26.97 |
| Pg | 29 - | 16 35.73 | 35.48 | 35.67 |
| Pg | 36 - | 16 45.73 | 45.48 | 45.67 |
Unit:mm Unit:mm
| Si | Minor diameter of int | ernal threads(D1) | Tap drill hole size |
| ze | Max. | Min. | (reference) |
| S0.4×0.1 | 0.330 | 0.304 | 0.32 |
| S0.5×0.125 | 0.415 | 0.380 | 0.41 |
| S0.6×0.15 | 0.502 | 0.456 | 0.49 |
| S0.7×0.175 | 0.585 | 0.532 | 0.57 |
| S0.8×0.2 | 0.665 | 0.608 | 0.65 |
| S0.9×0.225 | 0.745 | 0.684 | 0.73 |
| Minor diameter of in | ternal threads(D1) | Tap drill hole size | |
| Size | Max. | Min. | (reference) |
| Tr 10×2 | 8.236 | 8.000 | 8.2 |
| Tr 12×3 | 9.315 | 9.000 | 9.2 |
| Tr 12×2 | 10.236 | 10.000 | 10.2 |
| Tr 14×3 | 11.315 | 11.000 | 11.2 |
| Tr 16×4 | 12.375 | 12.000 | 12.3 |
| Tr 16×3 | 13.315 | 13.000 | 13.2 |
| Tr 18×4 | 14.375 | 14.000 | 14.3 |
| Tr 20×4 | 16.375 | 16.000 | 16.3 |
| Tr 22×5 | 17.450 | 17.000 | 17.3 |
| Tr 24×5 | 19.450 | 19.000 | 19.3 |
| Tr 25×5 | 20.450 | 20.000 | 20.3 |
| Tr 26×5 | 21.450 | 21.000 | 21.3 |
| Tr 28×5 | 23.450 | 23.000 | 23.3 |
| Tr 30×6 | 24.500 | 24.000 | 24.4 |
| Unit:mm | ||
| Size | Minor diameter of internal threads(D1) | Tap drill hole size |
| Max. Min. | (reference) | |
| 20.32W36 | 19.550 19.474 | 19.53 |
Technical Inf