"Size","Pitch (coarse)","Across flats s","Flange Ø dc max","Head height k max"
"M5","0.8","8","11.8","5.4"
"M6","1","10","14.2","6.6"
"M8","1.25","13","17.9","8.1"
"M10","1.5","15","21.8","9.2"
"M12","1.75","18","26","11.5"
"M14","2","21","29.9","12.8"
"M16","2","24","34.5","14.4"
"M20","2.5","30","42.8","17.1"
"Reference only — confirm against drawing. DIN 6921. REL India"