Stub Acme Threads Chart
| BASIC DIMENSIONS AND PITCH | ||||
|---|---|---|---|---|
| Nominal size (in) | TPI | Basic major D (in) | Basic pitch E (in) | Basic minor K (in) |
| 1/4 | 16 | .2500 | .2312 | .2125 |
| 5/16 | 14 | .3125 | .2911 | .2696 |
| 3/8 | 12 | .3750 | .3500 | .3250 |
| 7/16 | 12 | .4375 | .4125 | .3875 |
| 1/2 | 10 | .5000 | .4700 | .4400 |
| 5/8 | 8 | .6250 | .5875 | .5500 |
| 3/4 | 6 | .7500 | .7000 | .6500 |
| 7/8 | 6 | .8750 | .8250 | .7750 |
| 1 | 5 | 1.0000 | .9400 | .8800 |
| 1 1/4 | 5 | 1.2500 | 1.1900 | 1.1300 |
| 1 1/2 | 4 | 1.5000 | 1.4250 | 1.3500 |
| 2 | 4 | 2.0000 | 1.9250 | 1.8500 |
| 2 1/2 | 3 | 2.5000 | 2.4000 | 2.3000 |
| 3 | 2 | 3.0000 | 2.8500 | 2.7000 |
| 4 | 2 | 4.0000 | 3.8500 | 3.7000 |
| 5 | 2 | 5.0000 | 4.8500 | 4.7000 |
Stub Acme basic height is 0.3P. This table gives the basic series; thread classes, tolerances and gaging requirements are specified separately in FED-STD-H28 Section 13 / ASME B1.8.