S370D Oil Pan Drain Plug

[mntrails]

Does anyone know the size/thread type, etc for the oil drain plug of an S370D. The local auto parts places have a number of options that look like possible candidates but I've yet to have the original one with me to size a replacement properly. Does anyone know the specs?
Thanks in advance!

 

[lens12]

I don't know the size, but I can supply a used one.