Originally Posted by
Pozidrive
Interesting, but your hub nut still has a split pin?
No, it doesn't have a split pin. The outer edge or lip of the nut is turned to a thinner profile and once the nut is torqued up the lip is knocked with a hammer and punch into a longitudinal groove on the end of the stub axle. From personal experience, this isn't quite as secure a method as a castellated nut and split pin. However, a car can also be driven in reverse so it is important to secure it in both directions. Unlike a tail rotor, which only runs in one direction.