They use some kind of LocTite thread lock on it from the factory which is tough to get off but if you heat it till it smokes it spins off just fine. They also use a crush fit washer which i ground about 2 thousandths off so i dont have to crank it on so hard to get the brake properly aligned when i put it back on and i used Loctite green to keep it torqued on but removable to reinstall it.

Good luck, huuf