I don't have enough information to identify the screw nut. Could you provide more details or a description?
I don't have enough information to identify the screw nut. Could you provide more details or a description?
I’d consider M3 or M4, though it’s hard to say from the photos. If you purchased the new cooler, I’d recommend getting it replaced by the seller, since swapping replacement thumbnuts could be tricky depending on the model and maker.