Grohe bath waste missing 'sleeve nut'

[phatboy]

Hi,

Ages ago, I purchased a Grohe bath waste on eBay. I am getting to fitting it 11 months later, and have found the 'sleeve nut' is missing.

No reply from the seller obviously.

I cannot find the right spare online, but I can find the equivalent in Hansgrohe. I know the aren't the same company, but would any clued up plumber know if this particular part is interchangeable?
(Part 19 on the attached)


Standard McAlpine stuff has a different thread, so cannot use that - the Grohe is a far more coarse thread.

Thanks for any guidance!

Tim

 

[undertrained]

Quite often interchangeable as a lot are manufactured to the same standard.