M40-32 Adapter

I got my hands on a nice expensive kitchen faucet from Grohe but with their special easy to install threated plastic mount.Sadly the first owner broke the system.I wanted to replace its with a metal one from amazon but couldn't find the right adapter for it.I needed an adapter ring threated 32 on the inside and 40 on the outside without anything sticking out. I had doubt it would hold but surprisingly it works perflectly.I mounted it on the sink and applied more force that it would daily and it