It is made from a billet 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 twelve point manifold nuts.
Studs fit most GM, Littlefield, Blower Shop, BDS, Hampton or Mooneyham blowers. Will not fit Kobelco, Fowler, SSI, PSI or DMPE superchargers.
Stud length is 3.125" including hex top. Each kit includes eight studs, eight washers and eight twelve point nuts.