Unfortunately, most manufacturers "rumble" or vibrate hundreds of such components together for a few hours to de-burr threads. The pitfall with this secondary operation is percentage damge to the crests of threads in softer materials.
First: Try and set the printer up as a windows system printer- most HP plotters can satisfactorily use a generic HP driver.
Second: Line thicknesses generate from color dependant tables (.ctb files). Set these up in AutoCAD plotter manager and use them at print time.
If you are responsible for this system you should already be aware of the statutory requirements for pressure vessels and piping systems.
Consult your appropriate industrial codes before you kill someone.
