name of the """ that the emblem inserts into???

Say there is a hole in the fender that the leg of the emblem inserts into, it is blind so no not a speednut of such. It works on the same theory as the deal for sheetrock, you drill a hole,place that plastic deal in,the the srew does into the plastic deal. I can't call the name of them,have seen them on Feebay in assorted sizes.
Wife says I have the DRS Disease (don't remember chit) or is it DRC?????