This part is a good, used C4 Antenna Mast Nut which can be installed on any of the following Corvette models:
Body & Trim
Base, Collector’s Edition, Grand Sport
Base, Indianapolis 500 Pace Car, ZR-1
40th Anniversary Edition, Base, ZR-1
NOTE: This C4 Antenna Mast Nut is the black nut at the top of the factory power unit that holds the mast in place.
GM Part Numbers: 12512901