photo clam pc-36n, what size screw does QR attach with?

[tobotech]

Thanks to 20% cashback from ebay, I have a pc-36n ball head on the way, and wish to know what is used to attach the quick release clamp. From the pictures, it looks like a screw goes into the countersunk clamp, and threads into the neck of the ball. But I can't tell if its a 3/8", 1/4", M60, or something else.

I plan on replacing the QR with a RRS Lever clamp, but I don't know which to order because I don't know how it is going to attach.

thanks

[tobotech]

m6 is the size in case anyone finds this in a search.

[Mike K]

I plan on replacing the QR with a RRS Lever clamp, but I don't know which to order because I don't know how it is going to attach.


Call RRS, their customer support over the phone is good, their email support is terrible.
Mike K