*** IN STOCK SHIPS TODAY *** This is a kit that includes eight alum. 12 point nuts and eight hard anodized alum. studs. This kit fits all Littlefield, Blower Shop, Mooneyham, BDS and standard GM superchargers.
The 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 internal broached hex that make installation a snap with a 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.
It will not fit PSI, SSI, Fowler or Kobelco superchargers.