EGO 510 Thread Adapters Are Here! This adapter allows you to go from 510 female facing thread to the larger male facing eGo thread. This adapter turns your 510 Thread battery into a dual use 510 Thread/eGo thread battery. For use with almost any 510 Thread Battery. It also adds an extra layer of protection to the main 510 thread female hole on your battery. If a cartridge or tank were to leak this adapter can be cleaned or replaced and your main battery connection wont be gummed up from the leak.