It is made from a 7075 alum. that has been anodized for wear resistance and has an external hex for ease of installation. The stud has 7/16-14 threads on the manifold side and standard 7/16-20 for the manifold nuts.
Studs fit most SSI, Kobelco, or screw blowers but will not fit Mooneyham, Kuhl, Littlefield, BDS or Blower Shop superchargers. Stud length is 2.25" not including hex top. Studs are sold individual.