Meziere
-16 AN ORB to -12 AN Hose Fitting, BlueThis fitting is compatible with several of Meziere's 300 and 400 series water pumps. WP337, WP362, WP431 and WP432 are examples of a few pump numbers where this fitting could be used.
The -16 AN end is o-ring boss...
MEZ-WP16012B