My 2 year old 5x5 couplers looked like this but I can't find them anymore and now I need them in 5 x 8mm. I need it where it will lock around the acme and will lock around the stepper's shaft BUT it also needs a screw to go against the flat or it will be worthless to me.
There is the video at the spot showing the coupler: www.youtube.com/watch?v=FLKDa4V2ZIo&t=780
There is the video at the spot showing the coupler: www.youtube.com/watch?v=FLKDa4V2ZIo&t=780