 Series: American UN, External, Multitooth, RH Regular Type
Series: American UN, External, Multitooth, RH Regular Type 
| Designation | IC Inscribed Circle Dia. | TPI Threads Per Inch | RE Corner Radius | INSL Insert Length | PDX Profile Distance Ex | PDY Profile Distance Ey | NT Tooth Count | |
|---|---|---|---|---|---|---|---|---|
| 16ER12UN2M | 0.375 | 12 | 0.006 | 0.649 | 0.067 | 0.043 | 2 | |
| 16ER14UN2M | 0.375 | 14 | 0.011 | 0.649 | 0.134 | 0.087 | 2 | |
| 16ER16UN2M | 0.375 | 16 | 0.004 | 0.649 | 0.102 | 0.063 | 2 | |
| 16ER18UN2M | 0.375 | 18 | 0.004 | 0.649 | 0.091 | 0.059 | 2 | |
| 16ER24UN2M | 0.375 | 24 | 0.008 | 0.649 | 0.087 | 0.059 | 2 | |
| 22ER12UN2M | 0.500 | 12 | 0.011 | 0.866 | 0.134 | 0.087 | 2 | |
| 22ER12UN3M | 0.500 | 12 | 0.012 | 0.866 | 0.205 | 0.126 | 3 | |
| 27ER8UN2M | 0.625 | 8 | 0.016 | 1.083 | 0.193 | 0.122 | 2 |