Conversion & Reference Tables
TPI to Pitch (mm) Conversion
Conversion and reference tables to use alongside the thread charts.
- Sizes listed
- 66
| TPI | Pitch in Inches | Pitch mm |
|---|---|---|
| 127 | 0.00787 | 0.200 |
| 120 | 0.00833 | 0.212 |
| 112 | 0.00893 | 0.227 |
| 101.6 | 0.00984 | 0.250 |
| 100 | 0.01000 | 0.254 |
| 96 | 0.01042 | 0.265 |
| 90 | 0.01111 | 0.282 |
| 84.67 | 0.01181 | 0.300 |
| 80 | 0.01250 | 0.318 |
| 72.57 | 0.01378 | 0.350 |
| 72 | 0.01389 | 0.353 |
| 64 | 0.01563 | 0.397 |
| 63.5 | 0.01575 | 0.400 |
| 60 | 0.01667 | 0.423 |
| 56.44 | 0.01772 | 0.450 |
| 56 | 0.01786 | 0.454 |
| 50.8 | 0.01969 | 0.500 |
| 48 | 0.02083 | 0.529 |
| 44 | 0.02273 | 0.577 |
| 42.33 | 0.02362 | 0.600 |
| 40 | 0.02500 | 0.635 |
| 36.29 | 0.02756 | 0.700 |
| 36 | 0.02778 | 0.706 |
| 34 | 0.02941 | 0.747 |
| 33.87 | 0.02952 | 0.750 |
| 32 | 0.03125 | 0.794 |
| 31.75 | 0.03150 | 0.800 |
| 30 | 0.03333 | 0.847 |
| 28.22 | 0.03544 | 0.900 |
| 28 | 0.03571 | 0.907 |
| 27 | 0.03704 | 0.941 |
| 26 | 0.03846 | 0.977 |
| 25.4 | 0.03937 | 1.000 |
| 24 | 0.04167 | 1.058 |
| 22 | 0.04545 | 1.155 |
| 20.32 | 0.04921 | 1.250 |
| 20 | 0.05000 | 1.270 |
| 19 | 0.05263 | 1.337 |
| 18 | 0.05556 | 1.411 |
| 16.93 | 0.05907 | 1.500 |
| 16 | 0.06250 | 1.588 |
| 14.51 | 0.06897 | 1.752 |
| 14 | 0.07143 | 1.814 |
| 13 | 0.07692 | 1.954 |
| 12.7 | 0.07874 | 2.000 |
| 12 | 0.08333 | 2.117 |
| 11.5 | 0.08696 | 2.209 |
| 11 | 0.09091 | 2.309 |
| 10.16 | 0.09843 | 2.500 |
| 10 | 0.10000 | 2.540 |
| 9 | 0.11111 | 2.822 |
| 8.47 | 0.11806 | 2.999 |
| 8 | 0.12500 | 3.175 |
| 7.26 | 0.13774 | 3.499 |
| 7 | 0.14286 | 3.629 |
| 6.35 | 0.15748 | 4.000 |
| 6 | 0.16667 | 4.233 |
| 5.64 | 0.17730 | 4.504 |
| 5.08 | 0.19685 | 5.000 |
| 5 | 0.20000 | 5.080 |
| 4.62 | 0.21645 | 5.498 |
| 4.5 | 0.22222 | 5.644 |
| 4.23 | 0.23641 | 6.005 |
| 4 | 0.25000 | 6.350 |
| 3 | 0.33333 | 8.467 |
| 2 | 0.50000 | 12.700 |
Reference values only. Verify against the current edition of the governing standard before use in production drawings or manufacturing. Provided by Micro Components as a free engineering resource.