Yes, it's the fitting you've been looking for. Easily adapt a 3/4" barb / hose such as a factory intercooler pump, to a 12AN fitting.
These are commonly used by our customers for supercharger intercooler systems, but can have a lot of different uses for going heater hose to AN hose.
Sold each, black anodized for corrosion protection and discreet looks.
Note: Picture is a 10AN fitting, you will receive a 12AN. We also have 10AN if needed.