Modding Motherboard tray tapping size

Hi guys,

I'm trying to find out what size tap i need for the motherboard tray. Forgive my lack of knowledge in this area but it seems to be a BA 2.5? Not sure if thats how you classify it. But no one locally in Durban, South Africa seems to stock.

I'm trying to use the stock screws for mounting a motherboard to a tray. I believe they are national coarse no6.

Diameter: 0,138
Threads per inch: 32
Drill: 2.85 dia.

Can anyone tell me what size tap i need? is there a website that ships to south africa?

 

I believe you are thinking about 6-32.

 

Thanks talladega, I'll see if i can source one locally

 

Some mobo spacers are 3mm, some are 6-32.