Range of specifications include:
View 191 ER Series size specifications for both Metric ISO Threads and Unified Threads in the tables below. For all sizes, .6L, 1L and 2L are available.
 |
Metric ISO Threads | Unified Threads |
| Size | Size | |
| M 8 x 1.25 | 5/16-18 | |
| M 8 x 1 | 5/16-24 | |
| M 8 x 0.75 | 5/16-28 | |
| M 9 x 1.25 | 3/8-16 | |
| M 9 x 1 | 3/8-24 | |
| M 10 x 1.5 | 7/16-14 | |
| M 10 x 1.25 | 7/16-16 | |
| M 11 x 1.5 | 7/16-20 | |
| M 12 x 1.75 | 1/2-13 | |
| M 12 x 1.5 | 1/2-16 | |
| M 12 x 1.25 | 1/2-18 | |
| M 13 x 1.5 | 1/2-20 | |
| M 14 x 2 | 9/16-12 | |
| M 14 x 1.5 | 9/16-14 | |
| M 15 x 1.5 | 9/16-16 | |
| M 16 x 2 | 9/16-18 | |
| M 16 x 1.25 | 5/8-11 | |
| 5/8-12 | ||
| 5/8-16 | ||
| 5/8-18 |
