This part is a good, used C5 Underhood Fuse Block Cover which can be installed on any of the following Corvette models:
Body & Trim
50th Anniversary Edition, 50th Anniversary Edition Pace Car, Base, Z06
Base, Indianapolis 500 Pace Car
NOTE: This cover includes the nut to secure it to the fuse block.
GM Part Numbers: 15328643, 12176992, 12176786