Thread of Rod end body can be inch size 3/4-16 UNF, 5/8-18 UNF, or metric M16x1.5, M18x1.5, M20x1.5Thread of Ball stud can be inch size 7/16-20, or metric M10, M10x1.25, M12, M12x1.25, M12x1,5 etc.