The unique feature of these studs are that they have an internal machined hex that make installation a snap with a 5/32" Allen wrench. The alum. provides light weight while providing a safety factor in the event of a supercharger backfire saving your supercharger or manifold. These studs are not anodized and designed for the sanctioning bodies that do not allow black anodized blower studs.
The threads are a 7/16-20 on the nut side of the stud and on the manifold side a 7/16-14. Measurements of the blower stud are coarse thread is .800", shoulder is 1.425", fine thread is .650" with a .125" quick start tip.
These studs are sold individual but if needing nuts or washers be sure to check the May We Suggest Section below.