Mirror Bolt Thread Pitch

My bike never came with mirrors (PO said they were stolen) and I'm going to go with bar ends, but I'd like to get some bolts to go in the stock holes. I think they are 10mm threads but I'm wondering what the pitch is? 1.00, 1.25 or 1.5? Anyone know? Thanks.

pretty sure theyre 1.5

Thanks btchalice, much appreciated.

I'm not sure it's a 1.5. It's a 10mm bolt for sure, but I think finer than a 1.5 pitch.