CM5908 Radio Ground Screw

[Staszek]

I think they are the same screws for other radios as well including the E36, but does anyone have one or no the part number for it?

Its a longer screw with a plastic cap.

Here is a pic of it on the E36,

[AndrewBird]

That's not actually a grounding screw, the plastic part fits into a hole in the firewall and supports the rear of the radio.