Originally Posted by
Retro Grouch
I think they're M-4. At any rate, they're the same size as water bottle cage bolts. Sometimes it's necessary to run a tap through the braze ons before they'll screw in smoothly.
The correct name for a dork disc is spoke protector. They come in several varities depending on whether you have a spin-on freewheel or the number of spokes for a freehub wheel. Good luck finding somebody who stocks them.
Depends on the bike, but all of my newer bikes are M-5x.80 I would hit up the LBS for some, quite often they have them laying around. I prefer to use stainless steel when I can get them.
Aaron