Hybrid Studs have been with us since 1999. I designed them a year earlier, as a means of simplifying the method of converting the Corvair motor. Prior to this, the crank flange had to be re-threaded, a time consuming and expensive machine-shop-only job. The studs made the Corvair accessible to regular homebuilders with hand tools.
The Hybrid Studs thread right into any Corvair crank flange, and allow the Prop Hub to be mounted on a threaded crank in a matter of minutes. They work with both 5th bearing motors and standard ones.
The Studs required working with one of America’s leading manufacturers of studs through two stages of prototyping and testing. The Studs have rolled threads, and are manufactured with several stages of heat treatment under precision quality controlled conditions. The term “Hybrid” refers to the two different threads on each Stud: the 11/32″-24 flange thread is an obscure, Corvair-only thread used by General Motors; the other end of the Stud uses an aviation standard 3/8″-24. Their alloy is heat treated to match the same characteristics of AN bolts. I have sold hundreds of sets, and they have functioned flawlessly in service.
Includes 6 studs and install instructions.