Where is the best place to get speed nuts for Emblems and trim? Is there any difference with different suppliers? I know the nuts that hold my hood spear on were completely different than others on my 1970 Cutlass Supreme.

 

Lowes and Home Depot have a selection of sizes in their Specialty Hardware drawers

I just bought some exact size replacements for my hood louvers for only a couple of dollars a package (I think 4 or 5 to a package) - they have a bright finish that doesn't match the old bare metal ones, but mine aren't going on a show car, so not an issue for me and they'll be covered by the hood pad anyway.