
Unified Threads (UNC/UNF) Unit: mm
| Kind | Major diameter P | itch D | iamete | r Minor diameter | Kind | Major diameter | Pitch D | iamete | r Minor diameter | |||
| Size | of | Class Basic Basic | Upper | Lower | Tolerance Basic | Size | of Class | Basic | Basic Upper | Lower | Tolerance Basic | SP |
| tap | Size Size | Tolerance (μm) + | Tolerance (μm) + | (μm) Size | tap | Size | Size Toleranc (μm) + | e Tolerance (μm) + | (μm) Size | |||
| P2 | 40 | 0 | 40 | P2 | 40 | 20 | 20 | |||||
| P3 | 60 | 20 | 40 | P3 | 60 | 40 | 20 | |||||
| P5 | 100 | 60 | 40 | P4 | 80 | 60 | 20 | SL | ||||
| 3B | 48 | 22 | 26 | tap 3B | 43 | 15 | 28 | |||||
| tap | 2B | 73 | 35 | 38 | 1·1/4-12UNF | ting 2B | 31.750 | 30.376 70 | 29 | 29.459 41 | ||
| 1-8UNC | ng | 25.400 23.338 2BX | 103 | 65 | 21.963 38 | ut 2BX | 95 | 54 | 41 | |||
| cutti | GH3 | 38.1 | 25.4 | 12.7 | c GH3 | 38.1 | 12.7 | 25.4 | PO | |||
| GH4 | 50.8 | 38.1 | 12.7 | GH5 | 63.5 | 38.1 | 25.4 | |||||
| GH5 | 63.5 | 50.8 | 12.7 | GH7 | 88.9 | 63.5 | 25.4 | |||||
| GH7 | 88.9 | 76.2 | 12.7 | P3 | 60 | 20 | 40 | |||||
| GH8 | 101.6 | 88.9 | 12.7 | P4 | 80 | 40 | 40 | ST | ||||
| P2 | 40 | 20 | 20 | P5 | 100 | 60 | 40 | |||||
| P3 | 60 | 40 | 20 | p 3B | 55 | 27 | 28 | |||||
| P4 | 80 | 60 | 20 | 1·3/8-6UNC | g ta 2B | 34925 | 32174 83 | 41 | 30343 42 | |||
| 3B | 42 | 16 | 26 | uttin 2BX | . | . 113 | 71 | . 42 | ROLL | |||
| tap | 2B | 67 | 29 | 38 | c GH4 | 50.8 | 25.4 | 25.4 | ||||
| 1-12UNF | ting | 25.400 24.026 2BX | 92 | 54 | 23.109 38 | GH6 | 76.2 | 50.8 | 25.4 | |||
| cut | GH3 | 38.1 | 25.4 | 12.7 | GH8 | 101.6 | 76.2 | 25.4 | ||||
| GH4 | 50.8 | 38.1 | 12.7 | GH9 | 114.3 | 88.9 | 25.4 | |||||
| GH5 | 63.5 | 50.8 | 12.7 | P3 | 60 | 20 | 40 | CARBIDE | ||||
| GH6 | 76.2 | 63.5 | 12.7 | P4 | 80 | 40 | 40 | |||||
| GH7 | 88.9 | 76.2 | 12.7 | P5 | 100 | 60 | 40 | |||||
| P3 | 60 | 20 | 40 | tap 3B | 43 | 15 | 28 | |||||
| P4 | 80 | 40 | 40 | 1·3/8-12UNF | ting 2B | 34.925 | 33.551 71 | 29 | 32.634 42 | LONG | ||
| P5 | 100 | 60 | 40 | cut 2BX | 96 | 54 | 42 | |||||
| tap | 3B | 51 | 25 | 26 | GH3 | 38.1 | 12.7 | 25.4 | ||||
| 1·1/8-7UNC | ting | 28.575 26.218 2B | 78 | 38 | 24.648 40 | GH5 | 63.5 | 38.1 | 25.4 | HAND | ||
| cut | 2BX | 108 | 68 | 40 | GH7 | 88.9 | 63.5 | 25.4 | ||||
| GH4 | 50.8 | 25.4 | 25.4 | P3 | 60 | 20 | 40 | TAPS | ||||
| GH6 | 76.2 | 50.8 | 25.4 | P4 | 80 | 40 | 40 | |||||
| GH8 | 101.6 | 76.2 | 25.4 | P6 | 120 | 80 | 40 | |||||
| P2 | 40 | 20 | 20 | p 3B | 56 | 26 | 30 | EG (STI) | ||||
| P3 | 60 | 40 | 20 | g ta 2B | 85 | 41 | 44 | |||||
| P4 | 80 | 60 | 20 | 1·1/2-6UNC | uttin 2BX | 38.100 | 35.349 115 | 71 | 33.518 44 | |||
| tap | 3B | 42 | 15 | 27 | c GH4 | 50.8 | 25.4 | 25.4 | ||||
| 1·1/8-12UNF | ting | 28.575 27.201 2B | 69 | 29 | 26.284 40 | GH6 | 76.2 | 50.8 | 25.4 | SPECIAL THREADS | ||
| ut | 2BX | 94 | 54 | 40 | GH8 | 1016 | 762 | 254 | , | |||
| c | GH3 | 38.1 | 12.7 | 25.4 | GH9 | . 114.3 | . 88.9 | . 25.4 | GAUGES | |||
| GH5 | 63.5 | 38.1 | 25.4 | P3 | 60 | 20 | 40 | |||||
| GH7 | 88.9 | 63.5 | 25.4 | P4 | 80 | 40 | 40 | THREAD | ||||
| P3 | 60 | 20 | 40 | P5 | 100 | 60 | 40 | MILLS | ||||
| P4 | 80 | 40 | 40 | tap 3B | 44 | 14 | 30 | |||||
| P5 | 100 | 60 | 40 | 1·1/2-12UNF | ing 2B | 38.100 | 36.726 73 | 29 | 35.809 44 | |||
| tap | 3B | 52 | 24 | 28 | cutt 2BX | 98 | 54 | 44 | ||||
| 1·1/4-7UNC | ting | 31.750 29.393 2B | 79 | 38 | 27.823 41 | GH3 | 38.1 | 12.7 | 25.4 | DIES | ||
| cut | 2BX | 109 | 68 | 41 | GH5 | 63.5 | 38.1 | 25.4 | ||||
| GH4 | 50.8 | 25.4 | 25.4 | GH7 | 88.9 | 63.5 | 25.4 | |||||
| GH6 | 76.2 | 50.8 | 25.4 | |||||||||
| GH8 | 101.6 | 76.2 | 25.4 | CENTER |