Dr. Diff 8 3/4 axles

Most aftermarket axles are screw in studs,Something you should ask when ordering.
I like Dr.Diff products.
Your question depends on what wheel you will be using now or in the future that will determine the stud length. Taper seat wheel can use a plain open steel nut that will alow the stud threads to show to apease track specs,,acorn for the street.