Screws for 9.5mm plasterboard

[scotcruz]

Hi folks,

I have lowered a section on the ceiling in the living room using metal frame and wanted to check what screws I should use to put a 9.5mm plasterboard?

I know that the general rule is 32mm for 9.5mm going on Timber but assume metal needs self tapping screws.

Please advise.. as I think 32mm on metal would be an overkill.

 

[Deleted member 292770]

self tapping 25 0r 32