u/Atomic_Realia

Greetings,

It is a plastic piece so I wanted to try my chance in this sub.

I was trying to unscrew this part in a combi boiler.

https://preview.redd.it/r31ha7tzp22h1.jpg?width=185&format=pjpg&auto=webp&s=8daf310af07b90a0a44ffbc7bb68566f5c778799

https://preview.redd.it/rqulsb6zp22h1.jpg?width=1271&format=pjpg&auto=webp&s=543696dd582ae464f87d17607e0732e0994a9186

I have bought the appropriate 17mm ratchet wrench tool, but since the piece has a plastic head, it is stripped. It was hexagonal but now it is nearly rounded because of stripping.

Some info: No big tools go inside (narrow area). I can work with wrench, screwdriver type of thin tools.

I can hold the head with a plier but can not work on (not enough space).

So I will kindly ask your help about how to remove this stripped piece.

Thanks in advance!