Below is a custom material called 44W. The material has a material specific property called "GeneralName". That property has a value of "Steel". To be clear, all of these properties are within the Material.

Is there a way I can get that material specific property value (Steel) into the part's custom properties?

I've found this thread: but I can't seem to get the value to appear as has shown.

The following is what I'd like to be shown:

The Value from that material specific property is populated within the part's custom properties. I do not know what i have to enter in the expression field to pull that information from the material into the part.