I need to make a special stud. It needs 7/16" nc threads on one end and 5/16" nf on the other. I thought I'd use a 7/16 bolt and turn it down and use a die to thread the other. I have experience tapping holes and have a chart for what size drill to use. I have no idea what size to turn the bolt to to thread the other end. Is there a chart someplace I can copy to I don't have to keep asking dumb questions?