what do Cardas plugs use for strain relief?

[RnB180]

screws?

or do they not use strain relief?

[Todd R]

Originally Posted by RnB180

screws?

or do they not use strain relief?

They are potted with something (hot glue, epoxy, I'm not sure).
The potting extends under the heat shrink a bit as well. Very tough, you won't break them and if you do there is a lifetime warranty.
Todd R