What type of nut is used on 67 GTX/Satellite or Belvedere trunk moldings

[stat5]

What type of nuts are used to mount the trunk finish panels on 1967 GTX/Satellites and Belvederes?

Also what is used to seal around the panel studs so water doesn't get in through the holes punched in the trunk lid?

Pictures would be much appreciated

 

[copper67sat]

See this thread for discussion on these fasteners https://www.forbbodiesonly.com/moparforum/posts/911519616/