Does anyone know what the function of this part is?

Originally Posted by Trips

This not a rare thing to happen as quite a few members over the years have had this break including me.

I would recommend for the time being to remove both pieces and use some Krazy glue to hold them together, But know that it will eventually break again with the heat so replace it asap.

That piece is still used with the Stillens.

Look in the classified for someone who's selling one cheap.