25. Drill size and recommended hole size for forming taps
| Uni | fied F | ine T | hrea | ds ( | UNF) | | | | | Unit: mm | |
| Si | ze | | Cla | ss | Minor D Max. | iameter Min. | Drill Size | Recom Hole Max. | mended Size Min. | SP |
| No. | 0 | - 80 | UNF | 2BX | G4 | 1.305 | 1.182 | 1.41 | 1.44 | 1.38 | |
| No. | 1 | - 72 | UNF | 2BX | G4 | 1.612 | 1.474 | 1.73 | 1.76 | 1.69 | SL |
| No. | 2 | - 64 | UNF | 2BX | G4 | 1.912 | 1.756 | 2.03 | 2.06 | 1.99 | |
| No. | 3 | - 56 | UNF | 2BX | G4 | 2.197 | 2.025 | 2.33 | 2.37 | 2.29 | |
| No. | 4 | - 48 | UNF | 2BX | G5 | 2.458 | 2.271 | 2.64 | 2.68 | 2.59 | |
| No. | 5 | - 44 | UNF | 2BX | G5 | 2.740 | 2.551 | 2.95 | 2.99 | 2.90 | PO |
| No. | 6 | - 40 | UNF | 2BX | G5 | 3.022 | 2.820 | 3.24 | 3.29 | 3.19 | |
| No. | 8 | - 36 | UNF | 2BX | G5 | 3.606 | 3.404 | 3.86 | 3.91 | 3.81 | |
| No. | 10 | - 32 | UNF | 2BX | G6 | 4.165 | 3.963 | 4.49 | 4.54 | 4.44 | |
| No. | 12 | - 28 | UNF | 2BX | G6 | 4.724 | 4.496 | 5.09 | 5.14 | 5.03 | |
| 1/4 | - 28 | UNF | 2BX | G7 | 5.588 | 5.360 | 5.96 | 6.01 | 5.90 | ST |
| 5/16 | - 24 | UNF | 2BX | G7 | 7.035 | 6.782 | 7.48 | 7.54 | 7.41 | |
| 3/8 | - 24 | UNF | 2BX | G7 | 8.636 | 8.382 | 9.05 | 9.11 | 8.99 | |
| 7/16 | - 20 | UNF | 2BX | G8 | 10.033 | 9.729 | 10.55 | 10.63 | 10.47 | |
| 1/2 | - 20 | UNF | 2BX | G8 | 11.607 | 11.329 | 12.14 | 12.21 | 12.06 | ROLL |
| Size | | Cla | ss | Minor D Max. | iameter Min. | Drill Size | Recom Hole Max. | mended Size Min. |
| No. | 1 - 64 | UNC | 2BX | G4 | 1.582 | 1.425 | 1.71 | 1.75 | 1.67 |
| No. | 2 - 56 | UNC | 2BX | G4 | 1.871 | 1.695 | 2.01 | 2.05 | 1.96 |
| No. | 3 - 48 | UNC | 2BX | G4 | 2.146 | 1.941 | 2.30 | 2.35 | 2.25 |
| No. | 4 - 40 | UNC | 2BX | G5 | 2.385 | 2.157 | 2.60 | 2.65 | 2.54 |
| No. | 5 - 40 | UNC | 2BX | G5 | 2.697 | 2.487 | 2.92 | 2.97 | 2.87 |
| No. | 6 - 32 | UNC | 2BX | G5 | 2.895 | 2.642 | 3.17 | 3.23 | 3.11 |
| No. | 8 - 32 | UNC | 2BX | G6 | 3.530 | 3.302 | 3.84 | 3.89 | 3.78 |
| No. | 10 - 24 | UNC | 2BX | G6 | 3.962 | 3.683 | 4.37 | 4.44 | 4.30 |
| No. | 12 - 24 | UNC | 2BX | G6 | 4.597 | 4.344 | 5.02 | 5.08 | 4.96 |
| 1/4 - 20 | UNC | 2BX | G7 | 5.257 | 4.979 | 5.80 | 5.87 | 5.73 |
| 5/16 - 18 | UNC | 2BX | G7 | 6.731 | 6.401 | 7.31 | 7.39 | 7.22 |
| 3/8 - 16 | UNC | 2BX | G7 | 8.153 | 7.798 | 8.80 | 8.89 | 8.71 |
| 7/16 - 14 | UNC | 2BX | G8 | 9.550 | 9.144 | 10.30 | 10.40 | 10.20 |
| 1/2 - 13 | UNC | 2BX | G8 | 11.023 | 10.592 | 11.82 | 11.93 | 11.70 |
Cylindrical Pipe Threads - G(BSP) Unit: mm
CARBIDE
| Size | | Class | Minor D | iameter | Drill Size | Recom Hole | mended Size |
| | | | Max. | Min. | | Max. | Min. |
| G | 1/8 - | 28 | - | 8.848 | 8.566 | 9.29 | 9.36 | 9.22 |
| G | 1/4 - | 19 | - | 11.890 | 11.445 | 12.53 | 12.64 | 12.42 |
| G | 3/8 - | 19 | - | 15.395 | 14.950 | 16.03 | 16.14 | 15.92 |
| G | 1/2 - | 14 | - | 19.172 | 18.631 | 20.12 | 20.25 | 19.99 |
LONG
HAND
TAPS
Helical Coil Wire Thread Inserts Metric Coarse (EG STI M) Unit: mm Helical Coil Wire Thread Inserts Metric Fine (EG STI MF) Unit: mm
| Size | Class | Minor D Max. | iameter Min. | Drill Size | Recom Hole Max. | mended Size Min. | | Size Class | Minor Di Max. | ameter Min. | Drill Size | Recom Hole Max. | mended Size Min. | EG (STI) |
| EG(STI) | M 3 × 0.5 | - | 3.220 | 3.108 | 3.43 | 3.45 | 3.40 | EG(STI) | MF 10 × 1.25 | 10.483 | 10.271 | 11.04 | 11.10 | 10.99 | |
| EG(STI) | M 4 × 0.7 | - | 4.292 | 4.152 | 4.59 | 4.63 | 4.56 | EG(STI) | MF 12 × 1.5 | 12.560 | 12.324 | 13.25 | 13.31 | 13.18 | SPECIAL |
| EG(STI) | M 5 × 0.8 | - | 5.334 | 5.174 | 5.67 | 5.71 | 5.64 | EG(STI) | MF 12 × 1.25 | 12.483 | 12.271 | 13.04 | 13.09 | 12.98 | THREADS, |
| EG(STI) | M 6 × 1 | - | 6.407 | 6.217 | 6.84 | 6.89 | 6.80 | | | | | | | | GAUGES |
| EG(STI) | M 8 × 1.2 | 5 - | 8.483 | 8.271 | 9.05 | 9.10 | 8.99 | | | | | | | | |
| EG(STI) | M 10 × 1.5 | - | 10.560 | 10.324 | 11.25 | 11.31 | 11.19 | | | | | | | | |
| EG(STI) | M 12 × 1.7 | 5 - | 12.644 | 12.379 | 13.45 | 13.52 | 13.39 | | | | | | | | THREAD MILLS |
DIES
CENTER
DRILLS
Обший каталог Yamawa 2016 - 2017
Краткое руководство Yamawa по каталогам
Общий каталог Yamawa 2022 - 2023
Каталоги Yamawa твердосплавные метчики для закаленной стали