Panasonic Microwave Turntable Coupling B21315540AP Turntable / drive coupling / shaft for Panasonic brand microwave models listed below. This piece fits onto the turntable motor shaft and engages the cogs underneath the glass tray. (THIS PART ONLY WORKS IN CERTAIN MODELS. BEFORE ORDERING, PLEASE CHECK COMPATIBILITY WITH YOUR MODEL BY LOCATING YOUR MODEL NUMBER IN THE LIST BELOW). Panasonic part # : B21315540AP