I need 2 of the 1.0 thread pitch drain plugs, preferably the 5mm hex heads, but 3mm will work.

Additional info:

I recently learned 1986-1990 ZG1000 parts fiches show Float Bowl drain screws as M6x1.0 and the 1991 and up show BOTH M6x1.0 and M6x.75.

Sounds like 1991 and up C10's can have either, and may have 5mm OR 3mm hex head ??

The .75 threaded screws seem to have 3mm hex head.