"Size","Pitch (coarse)","Across flats s","Height h max"
"M3","0.5","5.5","4"
"M4","0.7","7","5"
"M5","0.8","8","5"
"M6","1","10","6"
"M8","1.25","13","8"
"M10","1.5","17","10"
"M12","1.75","19","12"
"M14","2","22","14"
"M16","2","24","16"
"M20","2.5","30","20"
"M24","3","36","24"
"Reference only — confirm against drawing. DIN 985. REL India"