Could you elaborate on this? Do you mean the nib housing has a triple start thread?
To echo what others have said so far, the tools you'll need are entirely up to you. The
first kitless pens I made (with wood) are a completely different animal to the ones most people start with (100% acrylic/resin) and therefore needed totally different jigs and tools based on my specific workflow to complete my personal design.
If you're a wiz with the metal lathe, you can do almost everything without even needing taps and dies that so many of us covet (even though I also have a metal lathe, I just haven't gotten into threading yet. The pen I linked to above was done entirely on a Harbor Freight wood lathe with collet chucks, custom mandrels, carbide hand tools, and other specialized jig not normally marketed as things used for kitless construction.