"Size","Inside Ø d1 min","Outside Ø d2 max","Thickness s"
"M3","3.1","6.2","0.8"
"M4","4.1","7.6","0.9"
"M5","5.1","9.2","1.2"
"M6","6.1","11.8","1.6"
"M8","8.1","14.8","2"
"M10","10.2","18.1","2.2"
"M12","12.2","21.1","2.5"
"M14","14.2","24.1","3"
"M16","16.2","27.4","3.5"
"M18","18.2","29.4","3.5"
"M20","20.2","33.6","4"
"M22","22.5","35.9","4"
"M24","24.5","40","5"
"Reference only — confirm against drawing. DIN 127 B. REL India"