Fyi, stainless into aluminum is a problem. Use anti-sieze or as mentioned earlier locktite. This prevents galling. Maybe not such a problem with coarse thread, but fine thread for sure will lock solid.
Never had a problem with stainless and aluminum. Stainless and stainless now that is a problem. I work on underwater stuff, so anti-seize goes on everything and blue grease coats all non threaded part interfaces.
