Date registered: Jul 2004
Mentioned: 3 Post(s)
Quoted: 52 Post(s)
Most garden-variety stainless steel nuts/bolts you see in the stores are not as strong as conventional steel IMO. No doubt, exotic (expensive) bolts are as strong or stronger. Obviously, using something less strong would not be acceptable, period.
Galling is a problem with stainless steel threads (especially on aluminum!), but this can be beaten by using a coating on the threads. How compatible this is with thread-locking materials, I don't know.
I think that the bolts from MB are pretty good. It would be nice to have them replated with cadmium like they (and most of the other steel parts) were when they were new. Very few companies will do this now because cadmium is very toxic and regulated. A modern replacement exists (zinc chromate?) but it doesn't look exactly the same and may not last as long. The good news is that this is done with "barrel plating" and it is fairly inexpensive. The bad news is that some of the parts you would like to do can't be done because they have to be immersed (fuel pressure dampers, for example).
On parts where this is practical, I've painted them with thin layers of weld-through primer (expensive, very high zinc, silvery), outdoor gold, and them high-temp engine clear with results that have looked good after several years of year-round driving. This won't win a concours but I am satisfied.
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