It's about 6:1

http://www.amishsoft.com/metric_thread_pitch.htm
M4-0.70
M5 0.80
M6-1,00
M8-1.25
M10-1.50
M12-1.75


-- 
http://www.piclist.com PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist