I'm interested in tooling up to do single-point thread cutting on my Taig mill, and thinking that an indexable insert system makes the most sense, but am a little bewildered by the variety available.

One of the projects that I have in mind is to make a new Tr12x1.5 lead nut for my garage-sale chinese 3-in-1 lathe.

Are there any insert systems that can thread a bore as small as 10mm?