Oil plug article number?

[MikaelC]

Anyone that have the article number of the oil plug and gasket one removes when draining oil from the gearbox?

I have a 480T 88, manual shift, M59 i think.

I got the wrong plug from Volvo, they did not find the right one in the parts book, and I can´t find it in the book either. I want to be sure that I have the right one as I want to replace the plug without letting all oil out

Help is very appreciated!
Mikael, Sweden