WHT 002 978 · Collar nut Audi genuine (OEM) part number WHT 002 978, Collar nut. Fitted on (3)COLLAR NUT — pos 15 (KAT618.BIN)COLLAR NUT — pos 15 (KAT618.BIN)COLLAR NUT — pos 15 (KAT752.BIN) Open the interactive exploded diagram →