Well maybe.
I had a couple of Alps blue pots with no locking nuts (lost). So not much use.
The size is 8mmx0.75.
Couldn't find anywhere to buy some.
Maplins led bezels in 5mm & 8mm come with nuts this size.
Better to spend £1.24 on a bezel than have a pot that can't be used.
Maplins stock No. N88AX.
Useful Alps pot info.
#1 Useful Alps pot info.
Much to learn there is.