Thread Geometry- Unified Coarse (UNC)
All Dimensions in inches unless otherwise stated
 |
d1 - Minor thread diameter male d2 - Minor Thread diameter female d3 - Pitch diameter d4 - Major diameter |
|---|
| Thread | Major Diameter | Thread Per Inch | Pitch Diameter | Minor Diameter Male Thread | Minor Diameter Female Thread |
|---|---|---|---|---|---|
| 1 | 0.0730 | 64 | 0.0629 | 0.0544 | 0.0561 |
| 2 | 0.0860 | 56 | 0.0744 | 0.0648 | 0.0667 |
| 3 | 0.0990 | 48 | 0.0855 | 0.0741 | 0.0764 |
| 4 | 0.1120 | 40 | 0.0958 | 0.0822 | 0.0849 |
| 5 | 0.1250 | 40 | 0.1088 | 0.0952 | 0.0979 |
| 6 | 0.1380 | 32 | 0.1177 | 0.1008 | 0.1042 |
| 8 | 0.1640 | 32 | 0.1437 | 0.1268 | 0.1302 |
| 10 | 0.1900 | 24 | 0.1629 | 0.1404 | 0.1449 |
| 12 | 0.2160 | 24 | 0.1889 | 0.1664 | 0.1709 |
| 1/4 | 0.2500 | 20 | 0.2175 | 0.1905 | 0.1959 |
| Thread | Major Diameter | Thread Per Inch | Pitch Diameter | Minor Diameter Male Thread | Minor Diameter Female Thread |
|---|---|---|---|---|---|
| 5/16 | 0.3125 | 18 | 0.2764 | 0.2464 | 0.2524 |
| 3/8 | 0.3750 | 16 | 0.3344 | 0.3005 | 0.3073 |
| 7/16 | 0.4375 | 14 | 0.3911 | 0.3525 | 0.3602 |
| 1/2 | 0.5000 | 13 | 0.4500 | 0.4084 | 0.4167 |
| 9/16 | 0.5625 | 12 | 0.5084 | 0.4633 | 0.4723 |
| 5/8 | 0.6250 | 11 | 0.5660 | 0.5168 | 0.5266 |
| 3/4 | 0.7500 | 10 | 0.6850 | 0.6309 | 0.6417 |
| 7/8 | 0.8750 | 9 | 0.8028 | 0.7427 | 0.7547 |
| 1 | 1.0000 | 8 | 0.9188 | 0.8512 | 0.8647 |
| 1-1/8 | 1.1250 | 7 | 1.0322 | 0.9549 | 0.9704 |
| Thread | Major Diameter | Thread Per Inch | Pitch Diameter | Minor Diameter Male Thread | Minor Diameter Female Thread |
|---|---|---|---|---|---|
| 1 1/4 | 1.2500 | 7 | 1.1572 | 1.0799 | 1.0954 |
| 1-3/8 | 1.3750 | 6 | 1.2667 | 1.1766 | 1.1946 |
| 1 1/2 | 1.5000 | 6 | 1.3917 | 1.3016 | 1.3196 |
| 1 3/4 | 1.7500 | 5 | 1.6201 | 1.5119 | 1.5335 |
| 2 | 2.0000 | 4.5 | 1.8557 | 1.7353 | 1.7594 |
| 2 1/4 | 2.2500 | 4.5 | 2.1057 | 1.9853 | 2.0094 |
| 2 1/2 | 2.5000 | 4 | 2.3376 | 2.2023 | 2.2294 |
| 2 3/4 | 2.7500 | 4 | 2.5876 | 2.4523 | 2.4794 |
| 3 | 3.0000 | 4 | 2.8376 | 2.7023 | 2.7294 |
| 3 1/4 | 3.2500 | 4 | 3.0876 | 2.9523 | 2.9794 |
| Thread | Major Diameter | Thread Per Inch | Pitch Diameter | Minor Diameter Male Thread | Minor Diameter Female Thread |
|---|---|---|---|---|---|
| 3 1/2 | 3.5000 | 4 | 3.3376 | 3.2023 | 3.2294 |
| 3 3/4 | 3.7500 | 4 | 3.5876 | 3.4523 | 3.4794 |
| 4 | 4.0000 | 4 | 3.8376 | 3.7023 | 3.7294 |
Note: Due to the fact that fastening applications differ greatly, the above information is for guidance only and is correct to the best of our knowledge. The customer must satisfy themselves with the performance of the fastener and validity of the data. TR Fastenings will not be held responsible for any failure that may occur from the use of this information.