There is an aluminum rod that i cant remember the name right now, u can heat it with a basic mapp torch kit... Once is hot is like applying electrical soldering stuff... so heat the area the stuff will melt, cover the threads and then rethread again. done. since is nothing structural is not a problem to use it. The problem comes when somebody wants to use this to fix a broken frame, it will work but the frame will brake in another place because there is a heat treatment that needs to be done to the whole frame after the welding.

Here it goes... http://www.durafix.com/