1/2-20 Weld-on stud. Perfect for attaching shock absorbers or control arms.  These are made of 4130 chromoly and are back drilled for weight reduction.  These are often used in sprint cars and midgets but can be used for other applications.  .985"O.D. X 1/2-20 Stud.  Custom options are available upon request. (Minimum charges may apply)