Miche spare parts are hard to find
 

Like spare chainring bolts. My LBS told me that they can order Shimano, Campy, Sugino, Truvativ, FSA, etc. but not Miche. I've also done my share of searching on smallbikeparts.com, thirdhand, etc. If I'da known that spare parts would be so hard to find, I wouldna have copped these Primatos.

Try chucks bikes. They are selling some Miche stuff right now, including the group. www.chucksbikes.com Not sure if they'll be parting with just chainring bolts, but it's worth a shot..

Why do they have to be Miche? Any short chainring bolt should work fine.

yeah, I tried some spares that I had in my parts bin, but the Miche bolt seems to be different. It doesn't have the slotted back of the bolt that other bolts do. Meh, let's see what my LBS says.

the slot is on the nut usually. Is the spider itself threaded? or does the nut somehow fit into the spider?

The spider is threaded. (I think, it's not in front of me right now).

You are correct.

Is it abnormal threading? If not just go to a hardware store.

I have used regular single speed chainring bolts on my Miche cranks, no problem.