
Unified Threads (UNC/UNF) Unit: mm
| Kind f | Major diameter Pitch D | iamete | r | Minor diameter | Si | Kind f Cl Major diameter Pitch D | iamete | r | Minor diameter | SP | |
| Size o tap | Class | Basic Basic Upper Tolerance | Lower Tolerance | Tolerance | Basic | ze | o tap ass Basic Si Basic Si Upper Toleranc | e Lower Tolerance | Toleran | ce Basic Si | |
| Size Size (μm) + | (μm) + | (μm) | Size | ze ze (μm) + | (μm) + | (μm) | ze | ||||
| P1 | 20 | 0 | 20 | P2 40 | 20 | 20 | |||||
| P2 | 40 | 20 | 20 | P3 60 | 40 | 20 | SL | ||||
| P3 | 60 | 40 | 20 | P4 80 | 60 | 20 | |||||
| p | 3B | 29 | 11 | 18 | p 3B 37 | 17 | 20 | ||||
| g ta | 2B | 46 | 20 | 26 | g ta 2B 56 | 27 | 29 | ||||
| ttin | 2BX | 7.938 7.249 66 | 40 | 26 | 6.792 | ttin 11.112 9.934 2BX 81 | 52 | 29 | 9.149 | ||
| cu | GH2 | 25.4 | 12.7 | 12.7 | cu GH3 38.1 | 25.4 | 12.7 | PO | |||
| 5/16-24UNF | GH3 | 38.1 | 25.4 | 12.7 | 7/16-14UNC | GH4 50.8 | 38.1 | 12.7 | |||
| GH4 | 50.8 | 38.1 | 12.7 | GH5 63.5 | 50.8 | 12.7 | |||||
| GH5 | 63.5 | 50.8 | 12.7 | GH6 76.2 | 63.5 | 12.7 | |||||
| 3BX | 64 | 51 | 13 | 3BX 76 | 64 | 12 | ST | ||||
| tap | 2BX | 76 | 64 | 12 | tap 2BX 102 | 89 | 13 | ||||
| ing | G6 | 7.938 7.249 76 | 64 | 12 | 6.792 | ing 11.112 9.934 G8 102 | 89 | 13 | 9.149 | ||
| form | H5 | 63.5 | 50.8 | 12.7 | form H5 63.5 | 50.8 | 12.7 | ||||
| H7 | 88.9 | 76.2 | 12.7 | H7 88.9 | 76.2 | 12.7 | ROLL | ||||
| P2 | 40 | 20 | 20 | P1 20 | 0 | 20 | |||||
| P3 | 60 | 40 | 20 | P2 40 | 20 | 20 | |||||
| P4 | 80 | 60 | 20 | P3 60 | 40 | 20 | |||||
| p | 3B | 34 | 16 | 18 | P4 80 | 60 | 20 | ||||
| g ta | 2B | 53 | 25 | 28 | p 3B 32 | 12 | 20 | CARBIDE | |||
| in | 9.525 8.494 | 7.805 | ta | ||||||||
| tt | 2BX | 78 | 50 | 28 | g 2B 51 | 22 | 29 | ||||
| cu | GH3 | 38.1 | 25.4 | 12.7 | uttin 11.112 10.287 2BX 76 | 47 | 29 | 9.738 | |||
| 3/8-16UNC | GH4 | 50.8 | 38.1 | 12.7 | c GH2 25.4 | 12.7 | 12.7 | ||||
| LONG | |||||||||||
| GH5 | 63.5 | 50.8 | 12.7 | 7/16-20UNF | GH3 38.1 | 25.4 | 12. | ||||
| GH4 08 | 381 | 12 | |||||||||
| GH6 | 76.2 | 63.5 | 12.7 | 5. | . | . | |||||
| 3BX | 76 | 64 | 12 | GH5 63.5 | 50.8 | 12.7 | |||||
| tap | 2BX | 102 | 89 | 13 | GH6 76.2 | 63.5 | 12.7 | ||||
| ing | G8 | 9.525 8.494 102 | 89 | 13 | 7.805 | 3BX 76 | 64 | 12 | HAND | ||
| form | H5 | 63.5 | 50.8 | 12.7 | tap 2BX 89 | 76 | 13 | TAPS | |||
| H7 | 88.9 | 76.2 | 12.7 | ing 11.112 10.287 G7 89 | 76 | 13 | 9.738 | ||||
| P1 | 20 | 0 | 20 | form H5 63.5 | 50.8 | 12.7 | |||||
| P2 | 40 | 20 | 20 | H7 88.9 | 76.2 | 12.7 | EG (STI) | ||||
| P3 | 60 | 40 | 20 | P2 40 | 20 | 20 | |||||
| p | 3B | 29 | 11 | 18 | P3 60 | 40 | 20 | ||||
| ta | 2B | 48 | 20 | 28 | P4 80 | 60 | 20 | ||||
| g | 9525 8837 | 8379 | |||||||||
| uttin | 2BX | . . 68 | 40 | 28 | . | p 3B 38 | 18 | 20 | SPECIAL THREADS | ||
| c | GH2 | 25.4 | 12.7 | 12.7 | g ta 12700 11430 2B 58 | 28 | 30 | 10584 | , GAUGES | ||
| 3/8-24UNF | GH3 | 38.1 | 25.4 | 12.7 | uttin . . 2BX 83 | 53 | 30 | . | |||
| GH4 | 50.8 | 38.1 | 12.7 | c GH3 38.1 | 25.4 | 12.7 | |||||
| GH5 | 63.5 | 50.8 | 12.7 | 1/2-13UNC | GH4 50.8 | 38.1 | 12.7 | THREAD | |||
| 3BX | 64 | 51 | 13 | GH5 635 | 508 | 127 | |||||
| tap | 2BX | 89 | 76 | 13 | . GH6 76.2 | . 63.5 | . 12.7 | MILLS | |||
| ming | G7 | 9.525 8.837 89 | 76 | 13 | 8.379 | 3BX 76 | 64 | 12 | |||
| r | H5 | 635 | 508 | 127 | ap 2BX 114 | 102 | 12 | ||||
| fo | H7 | . 88.9 | . 76.2 | . 12.7 | ming t 12.700 11.430 G9 114 | 102 | 12 | 10.584 | DIES | ||
| or H5 635 | 508 | 127 | |||||||||
| f . H7 88.9 | . 76.2 | . 12.7 |