Fasteners for Engine Size badges

Does anyone know what kind of fastener is used to hold the "340" badges on the hood scoops for a 70 Dart? I bought some repops for my project and it didn't come with the fasteners. The Classis Industries catalog doesn't refer to the style that is used so I'm not sure what to order. Thanks!
Here's what mine look like.

Dart340HoodScoopNuts.jpg