How to make Hand Screws?

I want to make some Jorgensen-style handscrew clamps. Does anyone have any clever suggestions how to make these without a LH tap/die? Or is that pretty much the only way to do it?

The new lathe MAY have that capability for both LH & RH THREADS. I’m not sure.

Ahhh - I need 0-80 thread.

Time to switch from Taig to Sherline