Correct Mounting Nuts For 71 Cuda Fender Louvers?

Hi all, I have a pretty nice set of original 71 Cuda chrome fender louvers and mounting brackets but no mounting nuts. What do the correct ones look like? Any pics? Thanks for any help.

Ed, these are the ones that are still on my car

Excellent!!! Thanks Joe. I probably have 5 dozen of those sitting in a parts box here that I can used to hold these assemblies together. I wasn't sure if they used just regular open end Pal nuts or the acorn style on yours. Thanks again buddy. Hope all is well. Eddie

didn't know if I should call them acorn or conical(?) - glad I could help Eddie - it was an easy pic with the phone and to post it