I need to attach some PG9 cable glands to enclosures where the walls are thick enough that the lock nut is barely hanging on. One possible alternative is to try and cut a thread which wound be M15-ish, 15.2mm, 0.41mm pitch. Problem is that's an odd size to get and I'm not sure cutting a plastic case will work. Any thoughts on this? Glue is out, the two components are nylon and PVC, even for the few adhesives that will handle that they won't deal with the mechanical stress of clamping the cable.