Customers say this coupler got blenders working again after the old one broke apart or disintegrated. It is reverse threaded: the old one loosens clockwise and the new one threads on counterclockwise. The old one comes free with a clockwise tap from a screwdriver and hammer, or by prying it up off the shaft. The leftover aluminum disc is part of the old coupler and must come off.
Summary written by AI from customer repair stories