N 029 703 1 - Crankcase/Block Coolant Drain Plug
There are two drain plugs - one on either side of the engine block.
This part was made NLA by Porsche in Janauary 2023. This is a direct replacement part.
They use a special sealing ring 900 123 055 30.
Drain Plug is item #5 on the attached PET illustration.