32UN - 60 Degree Unified Threads
The 32 thread series (32-UN) have been used more or less widely in industry for various applications where the Standard Coarse, Fine or Extra-fine Series were not as applicable. They are now recognized as Standard Unified Thread Series in a specified selection of diameters for each pitch.
| Nominal Size | External (b) | Internal (b) | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Threads per Inch and Series Designation | Class | Allowance | Major Diameter | Minor Diameter | UNR Minor Dia.,c Max (Ref.) | Class | Minor Diameter | Pitch Diameter | Major Diameter | |||||
| Max (d) | Min | Min (e) | Max (d) | Min | Min | Max | Min | Max | Min | |||||
| 7/16" - 32UN | 2A | 0.001 | 11.087 | 10.935 | - | 10.571 | 10.485 | 10.142 | 2B | 10.262 | 10.439 | 10.597 | 10.709 | 11.113 |
| 7/16" - 32UN | 3A | 0 | 11.113 | 10.96 | - | 10.597 | 10.533 | 10.168 | 3B | 10.262 | 10.399 | 10.597 | 10.681 | 11.113 |
| 1/2" - 32UN | 2A | 0.001 | 12.675 | 12.522 | - | 12.159 | 12.07 | 11.73 | 2B | 11.836 | 12.04 | 12.184 | 12.299 | 12.7 |
| 1/2" - 32UN | 3A | 0 | 12.7 | 12.548 | - | 12.184 | 12.118 | 11.755 | 3B | 11.836 | 11.986 | 12.184 | 12.271 | 12.7 |
| 9/16" - 32UN | 2A | 0.001 | 14.262 | 14.11 | - | 13.746 | 13.658 | 13.317 | 2B | 13.437 | 13.614 | 13.772 | 13.886 | 14.288 |
| 9/16" - 32UN | 3A | 0 | 14.288 | 14.135 | - | 13.772 | 13.706 | 13.343 | 3B | 13.437 | 13.574 | 13.772 | 13.858 | 14.288 |
| 5/8" - 32UN | 2A | 0.0011 | 15.847 | 15.695 | - | 15.331 | 15.24 | 14.902 | 2B | 15.011 | 15.215 | 15.359 | 15.476 | 15.875 |
| 5/8" - 32UN | 3A | 0 | 15.875 | 15.723 | - | 15.359 | 15.291 | 14.93 | 3B | 15.011 | 15.161 | 15.359 | 15.448 | 15.875 |
| 11/16" - 32UN | 2A | 0.0011 | 17.435 | 17.282 | - | 16.919 | 16.828 | 16.49 | 2B | 16.612 | 16.789 | 16.947 | 17.064 | 17.463 |
| 11/16" - 32UN | 3A | 0 | 17.463 | 17.31 | - | 16.947 | 16.878 | 16.518 | 3B | 16.612 | 16.749 | 16.947 | 17.036 | 17.463 |
| 3/4" - 32UN | 2A | 0.0011 | 19.022 | 18.87 | - | 18.506 | 18.415 | 18.077 | 2B | 18.186 | 18.39 | 18.534 | 18.654 | 19.05 |
| 3/4" - 32UN | 3A | 0 | 19.05 | 18.898 | - | 18.534 | 18.466 | 18.105 | 3B | 18.186 | 18.336 | 18.534 | 18.626 | 19.05 |
| 13/16" - 32UN | 2A | 0.0011 | 20.61 | 20.457 | - | 20.094 | 20.003 | 19.665 | 2B | 19.787 | 19.964 | 20.122 | 20.241 | 20.638 |
| 13/16" - 32UN | 3A | 0 | 20.638 | 20.485 | - | 20.122 | 20.053 | 19.693 | 3B | 19.787 | 19.924 | 20.122 | 20.213 | 20.638 |
| 7/8" - 32UN | 2A | 0.0011 | 22.197 | 22.045 | - | 21.681 | 21.59 | 21.252 | 2B | 21.361 | 21.565 | 21.709 | 21.829 | 22.225 |
| 7/8" - 32UN | 3A | 0 | 22.225 | 22.073 | - | 21.709 | 21.641 | 21.28 | 3B | 21.361 | 21.511 | 21.709 | 21.801 | 22.225 |
| 15/16" - 32UN | 2A | 0.0011 | 23.785 | 23.632 | - | 23.269 | 23.172 | 22.84 | 2B | 22.962 | 23.139 | 23.297 | 23.421 | 23.813 |
| 15/16" - 32UN | 3A | 0 | 23.813 | 23.66 | - | 23.297 | 23.226 | 22.868 | 3B | 22.962 | 23.099 | 23.297 | 23.391 | 23.813 |
| 1" - 32UN | 2A | 0.0011 | 25.372 | 25.22 | - | 24.856 | 24.76 | 24.427 | 2B | 24.536 | 24.74 | 24.884 | 25.009 | 25.4 |
| 1" - 32UN | 3A | 0 | 25.4 | 25.248 | - | 24.884 | 24.813 | 24.455 | 3B | 24.536 | 24.686 | 24.884 | 24.978 | 25.4 |