RBS SUPERCHARGERS will be CLOSED UNTIL Monday Aug 17thStud kit fits all Littlefield, Blower Shop, Mooneyham, BDS and standard GM superchargers. It will not fit PSI, SSI or Kobelco superchargers.
Threads are a 7/16-20 on the nut side of the stud and on the manifold side a 7/16-14. The unique feature of these studs are that they have an external hex that make installation a snap with a 5/16" wrench. The 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.
Measurements of the blower stud are coarse thread is .850", shoulder is .800", fine thread is 1.20" with a .275" installation hex.