Range of specifications include:
View ER 189 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 3.5 x 0.6 | #6-40 | |
| M 4 x 0.75 | #8-32 | |
| M 4 x 0.7 | #8-36 | |
| M 4 x 0.5 | #10-24 | |
| M 4.5 x 0.75 | #10-32 | |
| M 4.5 x 0.5 | #12-24 | |
| M 5 x 0.9 | #12-28 | |
| M 5 x 0.8 | #12-32 | |
| M 5 x 0.75 | 1/4-20 | |
| M 5.5 x 0.9 | 1/4-28 | |
| 1/4-32 |
