Carb clamp fastener thread size/pitch??

Does anyone know what the size thread/pitch is on the carb boot clamps?

The heads are stripped- and i want to replace them with allen socket heads.



Not sure if they are different on assorted models- I'm looking for the stock ones on an 82 kz1000 csr mII

M5, .8 pitch, 25mm long
In case anyone else's Philips heads stripped out like mine had.