Originally Posted by
dedhed
most common is M5 X .8
get stainless and various lenghts too if you can afford it.
+1
I buy mine in packs of 50 from Fastenal...average is about $10 or so a package. Also get washers and lock washers and a few of the locking nuts in the corresponding sizes. I typically use 10mm, 12mm, 15mm and 20mm lengths the most.
Aaron