Warpspeed
Solar Wizard
Studs work very well in the vehicle industry, and for aviation, and aerospace too, where aluminium is used a lot.
It will probably work for you too with your battery terminals.
Its not that aluminium is particularly weak, its that if you have a blind threaded hole, the bolt needs to be the exact right length.
If its too long, it will bottom out in the hole and then strip.
If the bolt is too short, only a fraction of the threads will be engaged, and the thread will probably then strip.
If you cross thread a bolt going into an aluminium hole, all bets are off.....
And if that bolt is frequently removed and replaced, wear in the thread, if nothing else will eventually lead to disaster.
So the proper engineering solution is to use a stud that goes all the way down, using all the available threads in the hole, and you will get all the strength that is possible with an absolute minimum risk of damage. Once the stud is in there, LEAVE IT ALONE.
Every time you screw something in and out of a tapped hole in aluminium the thread wears very slightly.
Its a crime against nature that the battery manufacturers usually supply bolts with these batteries. They cannot possibly know what you are going to bolt down to that terminal.
If its a really thin lug, the bolt must not be supplied too long.
If its a quarter inch thick copper busbar you are bolting down, the bolt will probably be a quarter of an inch too short, and probably strip sooner rather than later.
If the battery supplier provided reasonably long studs in their kit, you can bolt down just about anything using all the threads in the battery, no matter how thick what you are bolting down. And that stud will probably last the life of the battery without damage.
Of course "Bubba" after drinking a crate of beer with his massive long spanner can strip out just about any bolt.
We are talking here about applying sensible engineering, and doing the job properly.
It will probably work for you too with your battery terminals.
Its not that aluminium is particularly weak, its that if you have a blind threaded hole, the bolt needs to be the exact right length.
If its too long, it will bottom out in the hole and then strip.
If the bolt is too short, only a fraction of the threads will be engaged, and the thread will probably then strip.
If you cross thread a bolt going into an aluminium hole, all bets are off.....
And if that bolt is frequently removed and replaced, wear in the thread, if nothing else will eventually lead to disaster.
So the proper engineering solution is to use a stud that goes all the way down, using all the available threads in the hole, and you will get all the strength that is possible with an absolute minimum risk of damage. Once the stud is in there, LEAVE IT ALONE.
Every time you screw something in and out of a tapped hole in aluminium the thread wears very slightly.
Its a crime against nature that the battery manufacturers usually supply bolts with these batteries. They cannot possibly know what you are going to bolt down to that terminal.
If its a really thin lug, the bolt must not be supplied too long.
If its a quarter inch thick copper busbar you are bolting down, the bolt will probably be a quarter of an inch too short, and probably strip sooner rather than later.
If the battery supplier provided reasonably long studs in their kit, you can bolt down just about anything using all the threads in the battery, no matter how thick what you are bolting down. And that stud will probably last the life of the battery without damage.
Of course "Bubba" after drinking a crate of beer with his massive long spanner can strip out just about any bolt.
We are talking here about applying sensible engineering, and doing the job properly.