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.
Stud is 2.510" overall, .875" coarse thread, .500" shoulder, .975" fine thread with a .160" lead in to make starting the nut a snap without the chance of cross threading.
This kit fits all PSI screw superchargers.