What are the most common types of threads used on pumps?

On the pumps such as Fluid o tech, Procon and Nuert you will mainly find 3/8” BSP-G threads, but you can also find 3/8” NPT threads. For this you have special fittings, that are the brass 3/8” Male fittings and for the NPT model you have the nipple 3/8” NPT Male with 3/8” BSP