Cartridge mount screws - stainless steel

Is 2.5 -20mm the right size for Shelter 501 MKII?
McMaster-Carr does not have metric sizes brass screws.
Any other sources fro brass?

They seem to be quite difficult to find. You might try asking Mapleshade.

I was not able to locate stainless or brass screws today at least not 20 mm length only shorter ones, they told me they weren't available from the supplier. I purchased a die and made my own brass screws on the lathe , took about .5 hr.
Mounted up the ZYX Airy 3 on the Graham Phantom with the spacer they provide now i have to re-adjust everything.
I had to install the spacer under the cartridge cause my VTA was as low as i could go and i needed to lower it more.

Hi ; If you want to go over the edge Elusivedisc dot com has carbon fiber screws they look great until I saw the price check em out

$199 for two screws- I'm definetely going to pass.
This is one of the most rediculously priced items I've encountered lately.