BOLT

The size of the caliper mount bolt 

Part 09117-12012

It's used on a number of Suzuki vehicles for various functions. interestingly the price changes depending upon the Suzuki stated function, even though the part number is the same. - Suzuki Carry bolt = £1.20 , Suzuki Jimny caliper bolt = £5 - marketing at its best.

The web suggests M12x32, can't determine if it's 1.25 (most likely) or 1.5 pitch. 

Thanks Scimike

M12x32, yes pitch don't know by both as schmike suggests . 

Standard is an M12 x 28mm with a flange head

So I sell them as M12 x 30mm with a spring washer, yes, 1.25mm “metric fine” pitch thread…
 

A toyota Corolla Verso (or something) broke down right outside my garage once few years back. The guy jacked up the car and took the wheel off and stood there scratching his head. I went over to him and he said he had the car in a garage few weeks back and now the caliper had fell off. Seems the garage forgot to tighten the bolts or something. I just went into my garage and picked two SJ caliper bolts from the bucket, and they fit perfectly. He was very grateful and drove off
Same caliper bracket and bolts on the Jimny as the SJ as well.

However, please do not experiment with brake parts, buy new!