Bob,
Are you suggesting to use new parts whenever you disassemble the throttle butterfly?
Too much torque also will kill the new parts, because the construction is delicate whichever way you look at it, swaged screw or new.
I always wipe the thread with locktite before fitting it, and apply just enough torque to make it stick. Too much locktite would also cause heaps of problems, and the cure might well be worse than the desease.[&o]