I know you need to used a castle nut and cotter pin when bolting something when the parts move (rotate) as in the Cub type landing gear legs, etc. Control cable shackle, etc.
Been looking for the answer , nothing yet. How about when using a rod end where the bolt is torqued down and the rod is turning on the rod end ball that is stationary ?
Been looking for the answer , nothing yet. How about when using a rod end where the bolt is torqued down and the rod is turning on the rod end ball that is stationary ?