Here is my way to make small rivets.
This copper sheet is drilled some small holes and pasted on a board.
I use 0.3mm, 0.35mm and 0.4mm diameter holes.
Rivets are made with sprue.
Heat one end of sprue and press melted part on the holed sheet immediately.
Rivets are molded.
When I set rivets on my models, prick them softly with a knife to glue and set.
Practice is required but I love this way.
Did it become helpful?