Originally Posted by
uncle uncle
I don't know if there is cross over knowledge that will be beneficial here, but in the aircraft industry, where lots of aluminum gets used, we shy away from aluminum threaded parts. Bolts never seem to glide through the threads as well as say steel; usually the weight reduction gain isn't offset by the hassle.
Problem usually comes from the threads galling, then seizing because of it, then you have to also factor in how the bolt could stretch and reach maximum elongation towards it breaking....