Originally posted by New_Toasted
IntialD: This is a really stupid question but... M3/M4 = 3mm/4mm hex?
M3/M4 refers to diameter of the screws. No reference to the type of hex you need to use.
For instance M3 cap screws use 2.5 mm hexes whereas M3 button head screws use 2 mm hexes.
Originally posted by New_Toasted
But it's right that the radioplate mountings etc is done with mostly 2mm?
Yes, you need the 2 mm hex. But the button head screws are M3 i.e. 3 mm diameter.