.500" set back plate blower stud and nut kit. This is a kit that includes 8 heat treated steel twelve point nuts and 8 hard anodized alum. studs. Stud measures 2.170" overall, .450" coarse thread, .670" shoulder, .950" fine thread with .100" quick start top.
Kit fits all PSI, SSI, DMPE or Kobelco superchargers using a .500" thick set back blower manifold plate. The threads are a 7/16-20 on the nut side of the stud and on the manifold side a 7/16-14 which have been machined so you don't have to cut stock studs.
The unique feature of these studs are that they have an internal broached hex that make installation a snap with an allen wrench. Hard anodizing helps prevent galling and the alum. provides light weight while providing a safety factor in the event of a supercharger backfire saving your supercharger or manifold.