Ingersoll Rand OEM 96770797 Tube Fitting Elbow
96770797 is a tube fitting elbow used on several models of their UP6 5-15C and R4-11i rotary screw air compressors.
This typically connects to the inlet valve on one side and connects to the blue 6mm poly tubing on the other end.
This is an OEM part from Ingersoll Rand.