I purchased a pair of Sora BL-3500 brake levers second hand. These were sold without handlebar clamp bolts. I optimistically thought I could re-use the ones from my old mid 1990's Shimano brake lever and shifter combination. Turns out they are of a different pitch. I have been trying to confirm the correct size, but can't find the specification for this model. I do find a specification for other models (including recent model MTB brake levers): M5 x 18 (and I believe 1.0 pitch).
Is this the correct bolt size for my Sora brake levers?