As best as I can tell, you've identified the thread correctly. It is a 4 start thread @ 12 TPI. So now that we know what it is how do we cut it? I assume that you're cutting this on a lathe. The first thread is easy. It's just a standard G76 line(G32 or G92 are also threading cycles). I know to cut four threads, however, you would have to "index" the part to move the starting point of the thread 90 degrees. The first question I would ask is do you have a C-axis on your spindle? If so than that would be easy. Otherwise...I'm not sure how to do it. You may be best to refer to your control documentation and see if they have a section on cutting multiple start threads. BTW, I'm speaking on a strictly theoretical basis on how to cut this thread on a CNC. I've only cut one acme thread in my life and it was on a manual lathe....